Tootfinder

Do Outer Giants Inflate Neptune-sized Planets? An Architecture-Dependent Mass-Radius Relation
Dolev Bashi
https://arxiv.org/abs/2509.12328 https://arxiv.or…

Do Outer Giants Inflate Neptune-sized Planets? An Architecture-Dependent Mass-Radius Relation
Exoplanet demographics increasingly reveal that planetary properties depend not only on local irradiation and composition but also on the wider system architecture. We analyse a sample of Neptune-sized short-period planets with well-measured masses and radii, identifying those whose host stars harbour at least one confirmed outer-giant (OG) companion. On the mass-radius (M-R) plane, the two populations diverge modestly: inner planets in OG systems cluster at systematically larger radii than the…

yeah macOS Tahoe's corner radius on windows is a bit ridiculous imho

This came in my feed, and I can't disagree. I have worked with #StackOverflow developers in the past, and I think the result will be the same, or even worse.
https://www.<…

Crosslisted article(s) found for cs.CG. https://arxiv.org/list/cs.CG/new
[1/1]:
- Distributed-Memory Parallel Algorithms for Fixed-Radius Near Neighbor Graph Construction
Gabriel Raulet, Dmitriy Morozov, Aydin Buluc, Katherine Yelick

Estimates of the Second Bohr radius for vector-valued Holomorphic functions
Vibhuti Arora, Vinayak M
https://arxiv.org/abs/2510.07780 https://arxiv.org/pdf…

Estimates of the Second Bohr radius for vector-valued Holomorphic functions
This paper introduces the second Bohr radius for vector-valued holomorphic functions defined on arbitrary complete Reinhardt domains. We aim to establish the lower and upper bounds of the second Bohr radius in both finite and infinite-dimensional settings. Additionally, we provide specific estimates that connect the Second Bohr radius to a symmetric Banach space. We also explore the relationships between our findings and certain existing results.

Crosslisted article(s) found for hep-th. https://arxiv.org/list/hep-th/new
[1/1]:
- The Effective Radius of an Electric Point Charge in Nonlinear Electrodynamics
Tengyang Liu, Yisong Yang

The Effective Radius of an Electric Point Charge in Nonlinear Electrodynamics
Tengyang Liu, Yisong Yang
https://arxiv.org/abs/2510.11733 https://arxiv.org/…

The Effective Radius of an Electric Point Charge in Nonlinear Electrodynamics
Motivated by the century-old problem of modeling the electron as a pointlike particle with finite self energy, we develop a new class of nonlinear perturbations of Maxwell's electrodynamics inspired by, but distinct from, the Born--Infeld theory. A hallmark of our construction is that the effective radius of an electric point charge can be reduced arbitrarily by tuning a coupling parameter, thereby achieving scales far below the Born--Infeld bound and consistent with the experimentally undetect…

⚡ Radius of threat from Russia’s "Oreshnik": Zelenskyy shows the maps #shorts: https://benborges.xyz/2025/10/31/radius-of-threat-from-russias.html

An Ultra-Short Period Super-Earth and Sub-Neptune Spanning the Radius Valley Orbiting the Kinematic Thick Disk Star TOI-2345
Yoshi Nike Emilia Eschen, Thomas G. Wilson, Andrea Bonfanti, Carina M. Persson, S\'ergio G. Sousa, Monika Lendl, Alexis Heitzmann, Attila E. Simon, G\"oran Olofsson, Amadeo Castro-Gonz\'alez, Jo Ann Egger, Luca Fossati, Alexander James Mustill, Hugh P. Osborn, Hugo G. Vivien, Yann Alibert, Roi Alonso, Tamas B\'arczy, David Barrado, Susana C. C. B…

An Ultra-Short Period Super-Earth and Sub-Neptune Spanning the Radius Valley Orbiting the Kinematic Thick Disk Star TOI-2345
A crucial chemical link between stars and their orbiting exoplanets is thought to exist. If universal, this connection could affect the formation and evolution of all planets. Therefore, this potential vital link needs testing by characterising exoplanets around chemically-diverse stars. We present the discovery of two planets orbiting the metal-poor, kinematic thick-disk K-dwarf TOI-2345. TOI-2345 b is a super-Earth with a period of 1.05 days and TOI-2345 c is a sub-Neptune with a period of 21…

Floquet resonances and redshift-enhanced acceleration radiation from vibrating atoms in Schwarzschild spacetime
Reggie C. Pantig, Ali \"Ovg\"un, Syed Masood, Li-Gang Wang
https://arxiv.org/abs/2510.11761

Floquet resonances and redshift-enhanced acceleration radiation from vibrating atoms in Schwarzschild spacetime
We study acceleration radiation from a two-level Unruh-DeWitt detector that undergoes small-amplitude radial oscillations at fixed mean radius $R_0$ outside a Schwarzschild black hole. The massless scalar field is quantized in the Boulware vacuum to isolate curvature-modulated acceleration effects without a thermal Hawking background. Working in a (1+1) radial reduction and using first-order time-dependent perturbation, we evaluate the period-averaged transition rate (or the "Floquet" transitio…

Crosslisted article(s) found for hep-ph. https://arxiv.org/list/hep-ph/new
[1/1]:
- The Effective Radius of an Electric Point Charge in Nonlinear Electrodynamics
Tengyang Liu, Yisong Yang

The high order spectral radius of graphs without long cycles or paths
Yuntian Wang, Lizhu Sun, Changjiang Bu
https://arxiv.org/abs/2510.04461 https://arxiv…

The high order spectral radius of graphs without long cycles or paths
In 1959, Erdős and Gallai established two classic theorems, which determine the maximum number of edges in an $n$-vertex graph with no cycles of length at least $k$, and in an $n$-vertex graph with no paths on $k$ vertices, respectively. Subsequently, generalized and spectral versions of the Erdős-Gallai theorems have been investigated. A concept of a high order spectral radius for graphs was introduced in 2023, defined as the spectral radius of a tensor and termed the $t$-clique spectral rad…

Reconstruction of the Equations of State (EoSs) of Compact Stars using machine and deep learning regression techniques
Ioannis Stergakis
https://arxiv.org/abs/2509.13037 https:/…

Reconstruction of the Equations of State (EoSs) of Compact Stars using machine and deep learning regression techniques
This dissertation focuses on the reconstruction of Equations of State (EoSs) describing the interior of compact stars, using modern machine learning and deep learning methods. The pipeline is based on data from mass-radius (M-R) curves, obtained by numerically solving the Tolman-Oppenheimer-Volkoff equations for a wide range of admissible EoSs. The manuscript is divided into a Theoretical Part (Chs. 1-4) and a Computational Part (Chs. 5-7). The theoretical chapters analyze the properties of neu…

Stable and Fault-Tolerant Decentralized Traffic Engineering
Arjun Devraj, Umesh Krishnaswamy, Ying Zhang, Karuna Grewal, Justin Hsu, Eva Tardos, Rachee Singh
https://arxiv.org/abs/2510.11937

Stable and Fault-Tolerant Decentralized Traffic Engineering
Cloud providers have recently decentralized their wide-area network traffic engineering (TE) systems to contain the impact of TE controller failures. In the decentralized design, a controller fault only impacts its slice of the network, limiting the blast radius to a fraction of the network. However, we find that autonomous slice controllers can arrive at divergent traffic allocations that overload links by 30% beyond their capacity. We present Symphony, a decentralized TE system that addresses…

Deep JWST spectroscopy of galaxies in a candidate ionized bubble at $z = 8.7$: probing reionization at pMpc scales with Ly$\alpha$ emission
Lily Whitler, Daniel P. Stark, Charlotte A. Mason, Mengtao Tang, Zuyi Chen, Ting-Yi Lu, Gonzalo Prieto-Lyon, Anne Hutter
https://arxiv.org/abs/2510.12019

Deep JWST spectroscopy of galaxies in a candidate ionized bubble at $z = 8.7$: probing reionization at pMpc scales with Ly$α$ emission
Strong Ly$α$ emission observed from galaxies when the Universe is expected to be highly neutral is thought to trace large ionized regions that facilitate the transmission of Ly$α$ through the IGM. In this work, we use deep JWST Ly$α$ spectroscopy to constrain the size of a candidate ionized bubble at $z\sim8.7$ in the EGS field, with a potential radius of $R_b=2$ physical Mpc (pMpc) or larger. We measure a photometric galaxy density and find that the volume is a factor of $\sim2.5-3.6$ overd…

New ultralight scalar particles and the mass-radius relation of white dwarfs -- the important role of Sirius B
Kai Bartnick, Detlev Koester, Rolf-Peter Kudritzki, Konstantin Springmann, Stefan Stelzl, Andreas Weiler
https://arxiv.org/abs/2510.06312

New ultralight scalar particles and the mass-radius relation of white dwarfs -- the important role of Sirius B
We present the equation of state for two classes of new ultralight particles, a scalar field coupling to electrons and a light $\mathbb{Z}_\mathcal{N}$ QCD axion field coupling to nucleons. Both are potential candidates for dark matter. Using the scalar modified equations of state, we calculate models for white dwarf stars and compare their radii and masses with observed mass-radius data. The comparison results in stringent constraints on the masses of the particles and the coupling parameters.…

It bothered me *intensely* that the outer border radius has a different centre than the border radius of the icon within.

Insights into Planet Formation from the Ages, Masses, and Elemental Abundances of Host Stars
Xunzhou Chen, Tiancheng Sun, Lifei Ye
https://arxiv.org/abs/2510.10092 https://

Insights into Planet Formation from the Ages, Masses, and Elemental Abundances of Host Stars
How planetary systems form and evolve is a key question in astronomy. Revealing how host star properties, such as elemental abundances, age, and mass, differ from those of non-host stars, and how they correlate with planetary characteristics such as radius, provides new insights into the formation and evolutionary pathways of planetary systems. We determine precise ages for 18890 dwarfs and subgiants from the LAMOST-Kepler-Gaia sample with a mean age uncertainty of about 15 percent (median abou…

Comparison Theorems and the Intermediate Ricci Curvature Assumption
Yujie Wu
https://arxiv.org/abs/2510.11205 https://arxiv.org/pdf/2510.11205

Comparison Theorems and the Intermediate Ricci Curvature Assumption
We explore the notion of m-intermediate Ricci curvature assumption introduced by Brendle-Hirsch-Johne further. If a manifold has non-negative m-intermediate Ricci curvature and stable weighted slicing of order m-1, then the last slice has almost non-negative Ricci curvature in the spectral sense. We prove comparison theorems on the diameter and in-radius bound for stable weighted (respectively free boundary) slicing in such manifolds (respectively with mean convex boundary).

A geometrical approach to solve the proximity of a point to an axisymmetric quadric in space
Bibekananda Patra, Aditya Mahesh Kolte, Sandipan Bandyopadhyay
https://arxiv.org/abs/2510.08973

A geometrical approach to solve the proximity of a point to an axisymmetric quadric in space
This paper presents the classification of a general quadric into an axisymmetric quadric (AQ) and the solution to the problem of the proximity of a given point to an AQ. The problem of proximity in $R^3$ is reduced to the same in $R^2$, which is not found in the literature. A new method to solve the problem in $R^2$ is used based on the geometrical properties of the conics, such as sub-normal, length of the semi-major axis, eccentricity, slope and radius. Furthermore, the problem in $R^2$ is ca…

Islands in Simulated Cosmos: Probing the Hubble Flow around Groups and Clusters
David Benisty, Antonino Del Popolo
https://arxiv.org/abs/2510.11382 https://

Islands in Simulated Cosmos: Probing the Hubble Flow around Groups and Clusters
The local Hubble flow offers a powerful laboratory to study the interplay between cosmic expansion and gravitational dynamics. On large scales, galaxy velocities follow Hubble's law, but within groups and clusters local gravitational effects introduce significant departures from linearity. Using the IllustrisTNG cosmological simulations, we investigate whether dark energy leaves detectable imprints on the local velocity-radius relation. We model the kinematics with extensions of the Lemaitre-To…

Precise convergence rate of spectral radius of product of complex Ginibre
Yutao Ma, Xujia Meng
https://arxiv.org/abs/2510.07942 https://arxiv.org/pdf/2510.…

Precise convergence rate of spectral radius of product of complex Ginibre
Let $Z_1, \cdots, Z_n$ denote the eigenvalues of the product $\prod_{j=1}^{k_n} \boldsymbol{A}_j$, where $\{\boldsymbol{A}_j\}_{1 \le j \le k_n}$ are independent $n\times n$ complex Ginibre matrices. Define $α= \lim\limits_{n \to \infty} \frac{n}{k_n}$. We prove that $X_n,$ a suitably rescaled version of $\max_{1 \le j \le n} |Z_j|^2,$ converges weakly as follows: to a non-trivial distribution $Φ_α$ for $α\in (0, +\infty)$, to the Gumbel distribution when $α= +\infty$, and to the…

In my #HamRadio #POTA adventure today, I got my inverted-V linked dipole caught in twigs today and it died. The silicon wire winds easily around a tight radius, which is nice for putting it on the winder, but also winds around twigs easily, and that fine wire breaks easily. Easier than…

Stability of Traveling Fronts of the FitzHugh-Nagumo Equations on Cylindrical Surfaces
Afroditi Talidou
https://arxiv.org/abs/2510.08028 https://arxiv.org/…

Stability of Traveling Fronts of the FitzHugh-Nagumo Equations on Cylindrical Surfaces
The FitzHugh-Nagumo equations are known to admit traveling front solutions in one spatial dimension that are nonlinearly stable. This paper concerns the stability of traveling front solutions propagating on cylindrical surfaces. It is shown that such traveling fronts are nonlinearly stable on the surface of standard cylinders of constant radius. The analysis is extended to warped cylinders with slowly varying radius, where persistence of front-like solutions is established. Numerical simulation…

Constraining neutrino electromagnetic properties with recent low-energy electron recoil data at dark matter direct detection experiments
M. Demirci, H. I. Sezer, M. F. Mustamin, A. B. Balantekin
https://arxiv.org/abs/2510.12449

Constraining neutrino electromagnetic properties with recent low-energy electron recoil data at dark matter direct detection experiments
Neutrinos that are elastically scattered off atomic electrons provide a unique opportunity to investigate the Standard Model (SM) and beyond SM physics. In this work, we explore the new physics effects of neutrino electromagnetic properties through elastic neutrino-electron scattering using solar neutrinos at the low energy range of PandaX-4T and XENONnT experiments. The properties of interest include the neutrino magnetic moment, millicharge, and charge radius, all of which are natural consequ…

Stabilizability and lower spectral radius for linear switched systems with singular matrices
Carl P. Dettmann, Chenmiao Zhang
https://arxiv.org/abs/2509.17799 https://

Stabilizability and lower spectral radius for linear switched systems with singular matrices
We investigate the stabilizability of linear discrete-time switched systems with singular matrices, focusing on the spectral radius in this context. A new lower bound of the stabilizability radius is proposed, which is applicable to any matrix set. Based on this lower bound, more relationships between the stabilizability radius and joint spectral subradius are established. Detailed analysis of the stabilizability radius of a special kind of two-dimensional switched system, consisting of a singu…

Spectral extremal problems for the $(p,Q)$-spectral radius of hypergraphs
Jian Zheng, Honghai Li, Li Su
https://arxiv.org/abs/2510.02776 https://arxiv.org/…

Spectral extremal problems for the $(p,Q)$-spectral radius of hypergraphs
Let $Q$ be an $s$-vertex $r$-uniform hypergraph, and let $H$ be an $n$-vertex $r$-uniform hypergraph. Denote by $\mathcal{N}(Q,H)$ the number of isomorphic copies of $Q$ in $H$. For a hereditary family $\mathcal{P}$ of $r$-uniform hypergraphs, define $$π(Q,\mathcal{P}):=\lim\limits_{n\to \infty}\binom{n}{s}^{-1}\max\{\mathcal{N}(Q,H): H\in \mathcal{P}~~\mbox{and}~~|V(H)|=n\}.$$ For $p\geq1$, the $(p,Q)$-spectral radius of $H$ is defined as $$λ^{(p)}(Q,H):=\max_{\|\mathbf{x}\
…

Effect of Tube Radius on the Adsorption of Chlorothalonil on Single-Walled Carbon and Boron Nitride Nanotube Surfaces: A Theoretical Study for Environmental Remediation
Francisco Gleidson de S. Ferreira, Caio V. C. Ribeiro da Silva, Silvete Guerini, Kleuton A. L. Lima, Douglas Soares Galv\~ao, Jos\'e Milton Elias de Matos, Alexandre Araujo de Souza
https://…

Effect of Tube Radius on the Adsorption of Chlorothalonil on Single-Walled Carbon and Boron Nitride Nanotube Surfaces: A Theoretical Study for Environmental Remediation
We investigated the interaction of the pesticide chlorothalonil (CLT) with single-walled carbon nanotubes (CNTs) and boron nitride nanotubes (BNNTs) using density functional theory (DFT) with the SIESTA code. Structural, energetic, and electronic analyses were used to characterize adsorption on nanotube surfaces. The adsorption energy becomes more favorable as the tube radius increases, consistent with enhanced pi-pi stacking on less curved surfaces. Both CNTs and BNNTs physisorb CLT; however, …

Gamma-ray Orbital Modulation in Spider Pulsars: Three Discoveries and a Universal Modulated Fraction
Maksat Satybaldiev, Manuel Linares, Vittoria Vecchiotti
https://arxiv.org/abs/2510.11699

Gamma-ray Orbital Modulation in Spider Pulsars: Three Discoveries and a Universal Modulated Fraction
Compact binary millisecond pulsars (also known as spiders) allow us to probe pulsar winds in their innermost regions, between the light cylinder (radius $\sim10^{7}$ cm) and the companion star (at $\sim10^{11}$ cm). Their flux is known to vary along the orbit, from radio to X-rays. During the past decade, gamma-ray orbital modulation (GOM) has been discovered in a handful of spiders, but its origin remains largely unknown. We present the results of a systematic search for GOM among 43 systems, …

Unitary Quantum Cellular Automata for Density Classification
Pedro C. S. Costa, Yuval R. Sanders, Pedro Paulo Balbi, Gavin K. Brennen
https://arxiv.org/abs/2510.06947 https://…

Unitary Quantum Cellular Automata for Density Classification
We investigate the density classification task (DCT) -- determining the majority bit in a one-dimensional binary lattice -- within a quantum cellular automaton (CA) framework. While there is no one-dimensional two-state, radius $r \geq 1$, deterministic CA with periodic boundary conditions that solves the DCT perfectly, we explore whether a unitary quantum model can succeed. We employ the Partitioned Unitary Quantum Cellular Automaton (PUQCA), a number-conserving model, and, via evolutionary se…

#30DayMapChallenge 🗺️ Day 4️⃣: My data
Here is a hexbinned map of the over 1600 #Wikidata items I’ve created that have coordinates in the #Philippines 🇵🇭. The vast majority of these are items o…

Note on Kaniadakis Holographic Dark Energy
A. Sheykhi, A. Asvar, E. Ebrahimi
https://arxiv.org/abs/2510.11569 https://arxiv.org/pdf/2510.11569

Note on Kaniadakis Holographic Dark Energy
It is well-known that any modification to the entropy expression not only change the energy density of the holographic dark energy, but also modifies the cosmological field equations through thermodynamics-gravity correspondence. Here we revisit the Kaniadakis holographic dark energy (KHDE) in the background of the modified Kaniadakis cosmology by incorporating the effects of Kaniadakis entropy into the Friedmann equations. We choose the Hubble radius, $L=H^{-1}$, as system's IR cutoff and dete…

Geometric Interpretation of the Redshift Evolution of H_0(z)
Seokcheon Lee
https://arxiv.org/abs/2511.07454 https://arxiv.org/pdf/2511.07454 https://arxiv.org/html/2511.07454
arXiv:2511.07454v1 Announce Type: new
Abstract: Recent analyses of the Master Type Ia supernova (SN Ia) sample have revealed a mild redshift dependence in the inferred local Hubble parameter, often expressed as tilde{H}_0(z) = H_0 (1 z)^{-\alpha}, where \alpha quantifies possible departures from the standard cosmological time dilation relation. In this work, we show that such an empirical scaling can be interpreted as a purely geometric effect arising from a small, gauge-dependent normalization of cosmic time within the Robertson-Walker metric. This interpretation naturally unifies the observed redshift evolution of tilde{H}_0(z) and the corresponding deviation in SN Ia light-curve durations under a single geometric time-normalization framework. We demonstrate that this mapping leaves all background distances--linked to the Hubble radius in the general-relativistic frame--unchanged, while the apparent evolution in SN Ia luminosity distances arises from the redshift dependence of the Chandrasekhar mass. The result provides a unified and observationally consistent explanation of the mild Hubble-tension trend as a manifestation of the geometric structure of cosmic time rather than a modification of the expansion dynamics.
toXiv_bot_toot

Spatial Profiles of 3I/ATLAS CN and Ni Outgassing from Keck/KCWI Integral Field Spectroscopy
W. B. Hoogendam, B. J. Shappee, J. J. Wray, B. Yang, K. J. Meech, C. Ashall, D. D. Desai, K. Hart, J. T. Hinkle, A. Hoffman, E. M. Hu, D. O. Jones, K. Medler
https://arxiv.org/abs/2510.11779

Spatial Profiles of 3I/ATLAS CN and Ni Outgassing from Keck/KCWI Integral Field Spectroscopy
Cometary activity from interstellar objects provides a unique window into the environs of other stellar systems. We report blue-sensitive integral field unit spectroscopy of the interstellar object 3I/ATLAS from the Keck-II-mounted Keck Cosmic Web Imager on August 24, 2025 UT. We confirm previously reported CN and Ni outgassing, and present, for the first time, the radial profiles of Ni and CN emission in 3I/ATLAS. We find a characteristic $e$-folding radius of $593.7\pm14.8$ km for Ni and $841…

Exploring one-dimensional, binary, radius-2 cellular automata, over cyclic configurations, in terms of their ability to solve decision problems by distributed consensus
Eurico Ruivo, Pedro Paulo Balbi, K\'evin Perrot, Marco Montalva-Medel, Eric Goles
https://arxiv.org/abs/2510.01040

Exploring one-dimensional, binary, radius-2 cellular automata, over cyclic configurations, in terms of their ability to solve decision problems by distributed consensus
Probing the ability of automata networks to solve decision problems has received a continuous attention in the literature, and specially with the automata reaching the answer by distributed consensus, i.e., their all taking on a same state, out of two. In the case of binary automata networks, regardless of the kind of update employed, the networks should display only two possible attractors, the fixed points $0^L$ and $1^L$, for all cyclic configurations of size $L$. A previous investigation in…

The impact of the point spread function fitting radius on photometric uncertainty based on the Fisher information matrix
Sebastian Espinosa, Mario L. Vicu\~na, Rene A. Mendez, Jorge F. Silva, Marcos Orchard
https://arxiv.org/abs/2509.20613

The impact of the point spread function fitting radius on photometric uncertainty based on the Fisher information matrix
In point spread function (PSF) photometry, the selection of the fitting aperture radius plays a critical role in determining the precision of flux and background estimations. Traditional methods often rely on maximizing the signal-to-noise ratio (S/N) as a criterion for aperture selection. However, S/N-based approaches do not necessarily provide the optimal precision for joint estimation problems as they do not account for the statistical limits imposed by the Fisher information in the context …

Suzaku observations of outskirts of nearby clusters and groups: I. electron density and gas fraction to the virial radius
Kyoko Matsushita, Marie Kondo, Kosuke Sato, Toru Sasaki, Nobuhiro Okabe, Kotaro Fukushima
https://arxiv.org/abs/2510.04523

Suzaku observations of outskirts of nearby clusters and groups: I. electron density and gas fraction to the virial radius
We present an analysis of Suzaku observations of 14 nearby galaxy clusters and groups (z < 0.06), extending radial coverage out to the virial radius (approximately r200). The sample spans a wide mass range, from M500 about 2x10^13 to 7x10^14 solar masses, and includes well-studied systems such as Coma, Perseus, and Virgo. We carefully modeled all background components, including the soft X-ray foregrounds (the Local Hot Bubble, Milky Way Halo, and super-virial temperature components), the cosmi…

Usability, wie es nur die #DB in ihrer Lounge hinbekommt: Dort wo man seine Tasse zum einlegen des Teebeutels hinstellt, ist die Fläche minimal und Kante maximal abgerundet. Wer nicht genau hinsieht [oder gar schlecht sieht], dem kippt die Tasse weg und fällt auf den Boden. #deutschebahn

The numerical radius of fractional powers of matrices
Eman Aldabbas, Mohammad Sababhehb
https://arxiv.org/abs/2509.19882 https://arxiv.org/pdf/2509.19882…

The numerical radius of fractional powers of matrices
Using integral representations of the fractional power of matrices, and the geometric intuition of sectorial matrices, we show that for any accretive-dissipative matrix $A$ and any $t \in (0,1)$, the matrix \(A^t\) is accretive-dissipative, and that \[ ω(A^t)\geq ω^t(A) , \] where \(ω(\cdot)\) is the numerical radius. This inequality complements the well-known power inequality $ω(A^k)\leq ω^k(A)$, valid for any square matrix and positive integer power $k$. As an application, we prove that …

Optimizing the Interplay Between the Chord-to-Radius Ratio, Camber and Pitch of Cross-Flow Turbine Blades
Ari Athair, Aidan Hunt, Han-Wen Chi, Owen Williams
https://arxiv.org/abs/2509.14484

Optimizing the Interplay Between the Chord-to-Radius Ratio, Camber and Pitch of Cross-Flow Turbine Blades
This study examines the combined impact of the chord-to-radius ratio (c/R), blade camber, and preset pitch on cross-flow turbine performance. While prior research has examined individual effects of c/R and pitch, this work focuses on their interaction with camber and the resulting aerodynamic behaviors. Central to the analysis is the concept of virtual camber and virtual incidence, which arise from the curved trajectory of the blades, and are quantified using a conformal transformation. Using t…

Transformers Discover Molecular Structure Without Graph Priors
Tobias Kreiman, Yutong Bai, Fadi Atieh, Elizabeth Weaver, Eric Qu, Aditi S. Krishnapriyan
https://arxiv.org/abs/2510.02259

Transformers Discover Molecular Structure Without Graph Priors
Graph Neural Networks (GNNs) are the dominant architecture for molecular machine learning, particularly for molecular property prediction and machine learning interatomic potentials (MLIPs). GNNs perform message passing on predefined graphs often induced by a fixed radius cutoff or k-nearest neighbor scheme. While this design aligns with the locality present in many molecular tasks, a hard-coded graph can limit expressivity due to the fixed receptive field and slows down inference with sparse g…

A probabilistic approach to strong natural boundaries
Stamatis Dostoglou, Petros Valettas
https://arxiv.org/abs/2510.08717 https://arxiv.org/pdf/2510.08717…

A probabilistic approach to strong natural boundaries
We study the local non-extendability of random power series beyond their disk of convergence. We show that random power series formed by independent coefficients which are asymptotically anti-concentrated admit the circle of radius of convergence as strong natural boundary, even in a Nevanlinna sense. Our results complement and extend previous works of Ryll-Nardzewski (1953), and Breuer and Simon (2011).

Accretion onto Reissner-Nordstr\"{o}m naked singularities
Tomasz Krajewski, W{\l}odek Klu\'zniak
https://arxiv.org/abs/2510.10043 https://arxiv.or…

Accretion onto Reissner-Nordström naked singularities
Nearly every galactic core contains a supermassive compact object, hypothesized to be a Kerr black hole. It was only with the advent of Event Horizon Telescope observations that the predictions of this hypothesis could be observationally tested for our own Galaxy, and the nearby elliptical M87, on spatial scales comparable to the gravitational radius. At the same time it became possible to test whether alternatives such as naked singularities in general relativity, or similar objects in alterna…

🛡️ Safety-First Operations: Implements temp workdirs, quiet stdout handling, and git worktree isolation to reduce blast radius and prevent handshake breaks
🔧 CI-Friendly Tools: Includes validate_agents and list_agents commands for automated testing and verification in continuous integration pipelines
📋 Flexible Agent Creation: Supports both file-based registry (Markdown/JSON) and ad-hoc agent definition with profile and persona parameters

Observational constraints on f(Q,T) gravity from the mass-radius relation and stability of compact stars
S. K. Maurya, Abdul Aziz, Ksh. Newton Singh, G. Mustafa, Y. Sekhmani, Saibal Ray
https://arxiv.org/abs/2510.06003

Observational constraints on f(Q,T) gravity from the mass-radius relation and stability of compact stars
In this investigation we examine the astrophysical consequences of the influence of pressure anisotropy on the physical properties of observed pulsars within the background of $f(Q,T)$ gravity by choosing a specific form $f(Q, T)=ψ_1\, Q + ψ_2 T$, where $ψ_1$ and $ψ_2$ are the model parameters. Initially, we solve the modified field equations for anisotropic stellar configurations by assuming the physically valid metric potential along with anisotropic function for the distribution of the i…

AgentZero : Modeling Fear-Based Behavior
Vrinda Malhotra, Jiaman Li, Nandini Pisupati
https://arxiv.org/abs/2510.05185 https://arxiv.org/pdf/2510.05185

AgentZero++: Modeling Fear-Based Behavior
We present AgentZero++, an agent-based model that integrates cognitive, emotional, and social mechanisms to simulate decentralized collective violence in spatially distributed systems. Building on Epstein's Agent\_Zero framework, we extend the original model with eight behavioral enhancements: age-based impulse control; memory-based risk estimation; affect-cognition coupling; endogenous destructive radius; fight-or-flight dynamics; affective homophily; retaliatory damage; and multi-agent coordi…

Estimates of the first Dirichlet eigenvalue of graphs
Huiqiu Lin, Lianping Liu, Zhe You, Da Zhao
https://arxiv.org/abs/2510.04557 https://arxiv.org/pdf/251…

Estimates of the first Dirichlet eigenvalue of graphs
Inspired by the Li--Yau eigenvalue-diameter estimates, we investigate lower bounds for the first Dirichlet eigenvalue in terms of the diameter (or inscribed radius) of a graph. Let $G = (V, E)$ be a graph with boundary $B$. Assume that the interior $Ω= V \setminus B$ is connected. Let $r$ be the inscribed radius of $(G, B)$ and $d$ be the maximum degree of $G$. We prove that $$λ_1(G, B) \geq \frac{d - 1}{r d^r},$$ which can be viewed as an analogue of the Lin--Yau bound and the Meng--Lin boun…

Searching for Ultra-light Dark Matter in Spatial Correlations of White Dwarf Structure
Nicole R. Crumpler, Nadia L. Zakamska, Gautham Adamane Pallathadka, Kareem El-Badry
https://arxiv.org/abs/2510.00271

Searching for Ultra-light Dark Matter in Spatial Correlations of White Dwarf Structure
If dark matter is ultra-light and has certain Standard Model interactions, it can change the mass-radius relation of white dwarf stars. The coherence length of ultra-light dark matter imparts spatial correlations in deviations from the canonical mass-radius relation, and thus white dwarfs can be used to reconstruct the coherence length, or equivalently the particle mass, of the dark matter field. We simulate the observability of such spatial correlations accounting for realistic complications l…

Oscillating ring ferrodark solitons with breathing nematic core in a homogeneous spinor superfluid
Xiaoquan Yu
https://arxiv.org/abs/2509.13874 https://arx…

Oscillating ring ferrodark solitons with breathing nematic core in a homogeneous spinor superfluid
We study the dynamics of ring ferrodark solitons (FDSs) in a homogeneous quasi-two-dimensional (2D) ferromagnetic spin-1 Bose-Einstein condensate (BEC). In contrast to the usual expanding dynamics of ring dark solitons in a homogeneous system, the ring FDS radius exhibits self-sustained oscillations accompanied by the nematic tensor breathing at the magnetization-vanishing ring FDS core. When the ring radius greatly exceeds the FDS width, motion is nearly elastic, and we derive the ring-radius …

Probing dust torus radius--luminosity relation: An WISE view
Ashutosh Tomar, Suvendu Rakshit, Amit Kumar Mandal, Shivangi Pandey
https://arxiv.org/abs/2510.04517 https://…

Probing dust torus radius--luminosity relation: An WISE view
We present measurements of the dusty torus sizes of 51 active galactic nuclei (AGNs) with a redshift of $z<$ 0.8. Our analysis utilizes about 16 years of optical photometric data of 146 AGNs from various time-domain surveys, including ASAS-SN, CRTS, and ZTF, along with 14 years of infrared data in the $W$1 ($\sim$ 3.4 $μ$m) and $W$2 ($\sim$ 4.6 $μ$m) bands obtained from the Wide-Field Infrared Survey Explorer (WISE). The estimated dust torus size ranges from 1000 to 3000 days, using both the …

Intrinsic characteristic radius drives phonon anomalies in Janus transition metal dichalcogenide nanotubes
Jing-Jing Zhang, Jin-Wu Jiang
https://arxiv.org/abs/2509.14683 https:/…

Intrinsic characteristic radius drives phonon anomalies in Janus transition metal dichalcogenide nanotubes
Transition metal dichalcogenides and their derivatives offer a versatile platform for exploring novel structural and functional properties in low-dimensional materials. In particular, Janus monolayers possess an intrinsic out-of-plane asymmetry that induces a built-in bending radius, which can strongly influence their physical behavior. In this work, we investigate the tubular structures formed by rolling Janus monolayers into the Janus nanotube with an extrinsic radius. Using a combination of …

Modeling Spatial Heterogeneity in Exposure Buffers and Risk: A Hierarchical Bayesian Approach
Saskia Comess, Daniel E Ho, Joshua L Warren
https://arxiv.org/abs/2509.25708 https:…

Modeling Spatial Heterogeneity in Exposure Buffers and Risk: A Hierarchical Bayesian Approach
Place-based epidemiology studies often rely on circular buffers to define "exposure" to spatially distributed risk factors, where the buffer radius represents a threshold beyond which exposure does not influence the outcome of interest. This approach is popular due to its simplicity and alignment with public health policies. However, buffer radii are often chosen relatively arbitrarily and assumed constant across the spatial domain. This may result in suboptimal statistical inference if these m…

Anyone figured out some magic defaults write command on #macOS #Tahoe #tahoe26 that can reduce the ridiculous large corner radius?

Holographic Thermodynamics of Higher-Dimensional AdS Black Holes with CFT Rescaling
Yahya Ladghami, Taoufik Ouali
https://arxiv.org/abs/2510.05700 https://…

Holographic Thermodynamics of Higher-Dimensional AdS Black Holes with CFT Rescaling
In this paper, we study the thermodynamic behavior of charged AdS black holes in higher-dimensional spacetimes within the framework of conformal holographic extended thermodynamics. This formalism is based on a novel AdS/CFT dictionary in which the conformal rescaling factor of the boundary conformal field theory (CFT) is treated as a thermodynamic parameter, while Newton's constant is held fixed and the AdS radius is allowed to vary. We explore how variations in the CFT state, represented by i…

RLCracker: Exposing the Vulnerability of LLM Watermarks with Adaptive RL Attacks
Hanbo Huang, Yiran Zhang, Hao Zheng, Xuan Gong, Yihan Li, Lin Liu, Shiyu Liang
https://arxiv.org/abs/2509.20924

RLCracker: Exposing the Vulnerability of LLM Watermarks with Adaptive RL Attacks
Large Language Models (LLMs) watermarking has shown promise in detecting AI-generated content and mitigating misuse, with prior work claiming robustness against paraphrasing and text editing. In this paper, we argue that existing evaluations are not sufficiently adversarial, obscuring critical vulnerabilities and overstating the security. To address this, we introduce adaptive robustness radius, a formal metric that quantifies watermark resilience against adaptive adversaries. We theoretically …

Strong Basin of Attraction for Unmixing Kernels With the Variable Projection Method
Santos Michelena, Maxime Ferreira Da Costa, Jos\'e Picheral
https://arxiv.org/abs/2509.24428

Strong Basin of Attraction for Unmixing Kernels With the Variable Projection Method
The problem of recovering a mixture of spike signals convolved with distinct point spread functions (PSFs) lying on a parametric manifold, under the assumption that the spike locations are known, is studied. The PSF unmixing problem is formulated as a projected non-linear least squares estimator. A lower bound on the radius of the region of strong convexity is established in the presence of noise as a function of the manifold coherence and Lipschitz properties, guaranteeing convergence and stab…

BioBlobs: Differentiable Graph Partitioning for Protein Representation Learning
Xin Wang, Carlos Oliver
https://arxiv.org/abs/2510.01632 https://arxiv.org/…

BioBlobs: Differentiable Graph Partitioning for Protein Representation Learning
Protein function is driven by coherent substructures which vary in size and topology, yet current protein representation learning models (PRL) distort these signals by relying on rigid substructures such as k-hop and fixed radius neighbourhoods. We introduce BioBlobs, a plug-and-play, fully differentiable module that represents proteins by dynamically partitioning structures into flexibly-sized, non-overlapping substructures ("blobs"). The resulting blobs are quantized into a shared and interpr…

Elasto-viscous regime in coalescence of viscoelastic droplets
Pallavi Katre, Bimalendu Mahapatra, Manaswita Karmakar, Sarang Jagdish, Navin Kumar Chandra, Aloke Kumar
https://arxiv.org/abs/2510.06686

Elasto-viscous regime in coalescence of viscoelastic droplets
We report a regime transition in the coalescence of concentrated polymeric droplets in a pendant-pendant configuration. While Newtonian droplet coalescence has been extensively studied with distinct identification of viscous and inertial regimes, the presence of polymers introduces additional regimes governed by elasticity and molecular relaxation effects. The coalescence process is typically characterized by the neck radius, $R$, of the liquid bridge connecting the two droplets, following a po…

The polar debris disc around 99 Herculis: A potential signpost for polar circumbinary planets
Jeremy L. Smallwood, William DeRocco, Zhizhen Qin, Antranik A. Sefilian
https://arxiv.org/abs/2510.08698

The polar debris disc around 99 Herculis: A potential signpost for polar circumbinary planets
The nearby binary star system 99 Herculis (99 Her) is host to the only known polar-aligned circumbinary debris disc. We investigate the hypothesis that the narrow structure of this circumbinary disc is sculpted by the gravitational influence of one or more unseen polar circumbinary planets. We first establish the theoretically viable parameter space for a sculpting planet by considering dynamical stability and clearing mechanisms, including the chaotic zone, Hill radius, diffusion, and polar al…

Bounds on the propagation radius in power domination
Imran Allie, Brandon du Preez, Dean Reagon, Adriana Roux
https://arxiv.org/abs/2510.02211 https://arxi…

Bounds on the propagation radius in power domination
Let $G$ be a graph and let $S \subseteq V(G)$. It is said that $S$ \textit{dominates} $N[S]$. We say that $S$ \textit{monitors} vertices of $G$ as follows. Initially, all dominated vertices are monitored. If there exists a vertex $v \in G$ which is not monitored, but has all but one of its neighbours monitored, then $v$ becomes monitored itself. This step is called a \textit{propagation} step and is repeated until the process terminates. The process terminates when the there are no unmonitored …

On the radius of spatial analyticity for the Majda-Biello and Hirota-Satsuma systems
Seongyeon Kim, Ihyeok Seo
https://arxiv.org/abs/2509.21095 https://arx…

On the radius of spatial analyticity for the Majda-Biello and Hirota-Satsuma systems
We investigate the persistence of spatial analyticity for solutions to the Majda-Biello and Hirota-Satsuma systems with analytic initial data. This result is the first to establish analyticity persistence in such coupled KdV systems.

Flavor-Changing Non-Global Logarithms
Andrew J. Larkoski
https://arxiv.org/abs/2510.06031 https://arxiv.org/pdf/2510.06031…

Flavor-Changing Non-Global Logarithms
Non-global logarithms are low energy correlations between the substructure of a jet and the event in which it is immersed. We study the leading non-global logarithms that arise from soft quark--anti-quark emission and calculate their coefficient as a series in the jet radius, $R$, in arbitrary processes. We calculate the exact coefficient through quadratic order in $R$, and show that this truncation is within $5\%$ of the complete result for radii up to $R = 1$. These quark flavor-dependent non…

An in-depth study of brown dwarfs with TESS
F. Marcadon, A. Pr\v{s}a
https://arxiv.org/abs/2510.05852 https://arxiv.org/pdf/2510.05852

An in-depth study of brown dwarfs with TESS
The existence of a deficit of brown dwarfs (BDs) in close orbit around main-sequence stars is one of the most intriguing questions in stellar physics. This so-called BD desert may result from the transition between two different dominant formation processes occurring for different mass regimes. While the BD mass derived from radial-velocity measurements helps confirm the nature of the analyzed objects, the BD radius obtained from transits is important to better constrain the BD age, as BDs are …

GPU-Accelerated X-ray Pulse Profile Modeling
Tianzhe Zhou, Chun Huang
https://arxiv.org/abs/2510.07764 https://arxiv.org/pdf/2510.07764

GPU-Accelerated X-ray Pulse Profile Modeling
Pulse-profile modeling (PPM) of thermal X-ray emission from rotation-powered millisecond pulsars enables simultaneous constraints on the mass $M$, radius $R$, and hence the equation of state of cold, dense matter. However, Bayesian PPM has faced a hard accuracy-speed bottleneck: current production resolutions used to keep inference tractable can under-resolve extreme hotspot geometries and bias the waveform computation, whereas the higher resolutions that remove this bias push forward models to…

Some results on spectra and certain norms
Danielle Witt
https://arxiv.org/abs/2510.04199 https://arxiv.org/pdf/2510.04199

Some results on spectra and certain norms
Given the norms of powers $(\lVert x^n\rVert)_{n\geq 0}$ of a Banach algebra element $x$, the largest possible value of the minimum modulus on the spectrum of $x$ is determined. It is also shown that, given a Banach algebra element $x$ and a compact set $K\subset\mathbb{C}$ with maximum modulus no more than the spectral radius of $x$, there exists a Banach algebra element $y$ with $\lVert y^n\rVert=\lVert x^n\rVert$ for all $n\geq 0$ and spectrum equal to the union of the spectrum of $x$ and $K…

Eigenvalue Bounds for Random Matrices via Zerofreeness
Sidhanth Mohanty, Amit Rajaraman
https://arxiv.org/abs/2509.25471 https://arxiv.org/pdf/2509.25471…

Eigenvalue Bounds for Random Matrices via Zerofreeness
We introduce a new technique to prove bounds for the spectral radius of a random matrix, based on using Jensen's formula to establish the zerofreeness of the associated characteristic polynomial in a region of the complex plane. Our techniques are entirely non-asymptotic, and we instantiate it in three settings: (i) The spectral radius of non-asymptotic Girko matrices -- these are asymmetric matrices $\mathbf{M} \in \mathbb{C}^{n \times n}$ whose entries are independent and satisfy $\mathbb{E…

Landau-type Theorems for Polyanalytic and Log-$\alpha$-analytic functions
P. Li, M. -S. Liu, S. Ponnusamy, H. Zhao
https://arxiv.org/abs/2510.02806 https://

Landau-type Theorems for Polyanalytic and Log-$α$-analytic functions
In the present article, we investigate the univalence property of polyanalytic functions and $\log$-$α$-analytic functions. First, by using a new idea, we prove an improved lemma and the coefficient estimates for bounded polyanalytic functions on the unit disk. Then, we present three versions of Landau-type theorems for such functions and determine the univalence domain and the radius of schlicht disk. Finally, as a consequence, the Landau-type theorems for $\log$-$α$-analytic functions are a…

Spectral Tur\'an-type problems for the $\alpha$-spectral radius of hypergraphs with degree stability
Jian Zheng, Honghai Li, Li Su
https://arxiv.org/abs/2509.24354 https://

Spectral Turán-type problems for the $α$-spectral radius of hypergraphs with degree stability
An $r$-pattern $P$ is defined as an ordered pair $P=([l],E)$, where $l$ is a positive integer and $E$ is a set of $r$-multisets with elements from $[l]$. An $r$-graph $H$ is said to be $P$-colorable if there is a homomorphism $ϕ$: $V(H)\rightarrow [l]$ such that the $r$-multiset $\{ϕ(v_{1}),\ldots,ϕ(v_{r})\}$ is in $E$ for every edge $\{v_{1},\ldots,v_{r}\}\in E(H)$. Let $Col(P)$ denote the family of all $P$-colorable $r$-graphs. This paper establishes spectral extremal results for $α$-spec…

Probing Strange Dark Matter through $f$-mode Oscillations of Neutron Stars with Hyperons and Quark Matter
Mahboubeh Shahrbaf, Prashant Thakur, Davood Rafiei Karkevandi
https://arxiv.org/abs/2510.08115 …

Probing Strange Dark Matter through $f$-mode Oscillations of Neutron Stars with Hyperons and Quark Matter
We investigate the impact of a hypothetical bosonic dark matter (DM) candidate, the sexaquark, on the fundamental ($f$-mode) oscillations of neutron stars (NSs). By varying the DM particle mass and considering different core compositions including hypernuclear matter, sexaquark DM, and deconfined quark matter (QM), we construct hybrid equations of state (EOS) with a smooth hadron--quark crossover that remain consistent with current astrophysical constraints on mass, radius, and tidal deformabil…

Singularities as Solitons? Quantum Vacuum Architecture of Black Holes
Eren Erberk Erkul
https://arxiv.org/abs/2510.06428 https://arxiv.org/pdf/2510.06428…

Singularities as Solitons? Quantum Vacuum Architecture of Black Holes
We propose that black holes are \emph{soliton-esque} objects, where gravitational collapse is balanced by quantum vacuum dispersion, modeled via \(R+αR^{2}\) gravity. Classical singularities are replaced by oscillating, finite-radius cores, thereby evading static no-go theorems. The event horizon is replaced by the \textit{Lamarina}, a surface of maximum redshift whose surface geometry yields Hawking-like radiation with corrections. The Raychaudhuri equations impose a Dyson-type ceiling on the…

Two Comments on "Laplace comparison on Kahler Ricci flow and convergence (arXiv:2509.14820v1)"
Xiuxiong Chen, Bing Wang
https://arxiv.org/abs/2509.23346 https://

Two Comments on "Laplace comparison on Kahler Ricci flow and convergence (arXiv:2509.14820v1)"
We clarify the definition of polarized canonical radius in the study of Kahler Ricci flow.

Radiation of "breathing" vortex electron packets in magnetic field
G. V. Zmaga, G. K. Sizykh, D. V. Grosman, Qi Meng, Liping Zou, Pengming Zhang, D. V. Karlovets
https://arxiv.org/abs/2509.21195

Radiation of "breathing" vortex electron packets in magnetic field
When a vortex electron with an orbital angular momentum (OAM) enters a magnetic field, its quantum state is described with a nonstationary Laguerre-Gaussian (NSLG) state rather than with a stationary Landau state. A key feature of these NSLG states is oscillations of the electron wave packet's root-mean-square (r.m.s.) radius, similar to betatron oscillations. Classically, such an oscillating charge distribution is expected to emit photons. This raises a critical question: does this radiation c…

The SRG/eROSITA All-Sky Survey. Detection of shock-heated gas beyond the halo boundary into the accretion region
X. Zhang, E. Bulbul, B. Diemer, Y. E. Bahar, J. Comparat, V. Ghirardini, A. Liu, N. Malavasi, T. Mistele, M. Ramos-Ceja, J. S. Sanders, Y. Zhang, E. Artis, Z. Ding, L. Fiorino, M. Kluge, A. Merloni, K. Nandra, S. Zelmer
https://…

The SRG/eROSITA All-Sky Survey. Detection of shock-heated gas beyond the halo boundary into the accretion region
The hot gas in the outskirts of galaxy cluster-sized halos, extending around and beyond the virial radius into nearby accretion regions, remains among one of the least explored baryon components of large-scale cosmic structure. We present a stacking analysis of 680 galaxy clusters located in the western Galactic hemisphere, using data from the first two years of the SRG/eROSITA All-Sky Survey. The stacked X-ray surface brightness profile reveals a statistically significant signal extending out …

Recalibration of the H$\alpha$ surface brightness-radius relation for planetary nebulae using Gaia DR3: new distances and the Milky Way oxygen radial gradient
Oscar Cavichia, Hektor Monteiro, Adalberto R. da Cunha-Silva, Walter J. Maciel, Andr\'e F. S. Cardoso
https://arxiv.org/abs/2509.19239

Recalibration of the H$α$ surface brightness-radius relation for planetary nebulae using Gaia DR3: new distances and the Milky Way oxygen radial gradient
The spatial distribution of chemical elements in the Galactic disk provides key constraints on models of galaxy evolution. However, studies using planetary nebulae (PNe) as tracers have been historically limited by large uncertainties in their distances. To overcome the long-standing distance uncertainties, we recalibrated the H$α$ surface brightness-radius relation (Frew et al. 2016) with Gaia DR3 parallaxes, deriving statistical distances for 1,200 PNe and Bayesian distances for 419 objects …

On the eigenvalues of the biharmonic operator on annuli
Davide Buoso, Riccardo Molinarolo
https://arxiv.org/abs/2510.04809 https://arxiv.org/pdf/2510.04809…

On the eigenvalues of the biharmonic operator on annuli
We show that the fundamental tone of the bilaplacian with Dirichlet or Navier boundary conditions on radially symmetric domains is always simple in dimension $N\ge3$. In dimension $N=2$ we show that it is simple if the inner radius is big enough.

Entanglement entropy between tangent balls in CFT$_D$
Jiankun Li, Li Song
https://arxiv.org/abs/2510.01655 https://arxiv.org/pdf/2510.01655

Entanglement entropy between tangent balls in CFT$_D$
We apply the universal method developed in \cite{Jiang:2025jnk} to compute the entanglement entropy between two tangent balls in CFT$_D$. When taking the radius of one ball to infinity, it gives the entanglement entropy between a ball and its tangent half plane. In two-dimensional case, this configuration is equivalent to the entanglement in boundary conformal field theory (BCFT) between the negative half-axis and an interval ending on the boundary.

Understanding the Origins of Super-Puff Planets: A New Mass-Loss Regime Coupled to Planetary Evolution
Yao Tang, Jonathan J. Fortney, Ruth Murray-Clay, Madelyne Broome
https://arxiv.org/abs/2510.02201 …

Understanding the Origins of Super-Puff Planets: A New Mass-Loss Regime Coupled to Planetary Evolution
Super-puffs are a class of low-mass, large-radius planets that have challenged planet formation and evolution models. Their high inferred H/He mass fractions, required to explain their physical sizes, would lead to rapid atmospheric escape, raising questions about their long-term retention. Recent modeling work indicates that low-mass planets typically require 50\% less H/He mass to match their observed radius, due to significant roles of the radiative atmosphere and interior heating from the r…

Extremal distance spectral radius of graphs with $h$-extra $r$-component connectivity
Daoxia Zhang, Dan Li, Wenxiu Ding
https://arxiv.org/abs/2509.22538 https://

Extremal distance spectral radius of graphs with $h$-extra $r$-component connectivity
For two integers $r\geq 2$ and $h\geq 0$, the $h$-extra $r$-component connectivity of a graph $G$, denoted by $cκ_{r}^{h}$, is defined as the minimum number of vertices whose removal produces a disconnected graph with at least $r$ components, where each component contains at least $h+1$ vertices. Let $\mathcal{G}_{n,δ}^{cκ_{r}^{h}}$ represent the set of graphs of order $n$ with minimum degree $δ$ and $h$-extra $r$-component connectivity $cκ_{r}^{h}$. Hu, Lin, and Zhang [\textit{Discrete Ma…

Resonant Singly Heavy Pentaquarks in the MIT Bag Model: Mass Spectra and Strong Decays
Wen-Nian Liu, Cheng-Jie Wang, Kai-Kai Zhang, Fu-Quan Dou
https://arxiv.org/abs/2510.04813 …

Resonant Singly Heavy Pentaquarks in the MIT Bag Model: Mass Spectra and Strong Decays
Exploring the limits of color interactions in multiquark states is an important topic. Based on the bag confinement picture of hadrons, we find that for singly heavy pentaquarks, the bag confinement radius precisely falls within the range of color interaction limits provided by lattice QCD, approximately 1.17--1.29$\,\text{fm}$. This leads us to believe that singly heavy pentaquark states have the potential to form resonant states. Inspired by singly heavy baryons, we consider the mirror pentaq…

Modified Fronsdal coordinates for maximally extended Schwarzschild spacetime
Andrei Galiautdinov
https://arxiv.org/abs/2510.07287 https://arxiv.org/pdf/251…

Modified Fronsdal coordinates for maximally extended Schwarzschild spacetime
We introduce a coordinate system that complements the Kruskal--Szekeres extension. Like the standard construction, it covers the maximally extended Schwarzschild manifold in its entirety, while offering an additional advantage of expressing the areal radius as an explicit function of the new coordinates. Its main limitation, however, is that radial null geodesics are no longer represented as 45-degree lines in the Kruskal plane, making the causal structure more difficult to interpret. Neverthel…

CHEMOUT: CHEMical complexity in star-forming regions of the OUTer Galaxy. V. Chemical composition gradients as a function of the Galactocentric radius
D. Gigli, F. Fontani, L. Colzi, G. Vermari\"en, S. Viti, V. M. Rivilla, A. S\'anchez-Monge
https://arxiv.org/abs/2509.26556

CHEMOUT: CHEMical complexity in star-forming regions of the OUTer Galaxy. V. Chemical composition gradients as a function of the Galactocentric radius
The outer Galaxy is characterized by a lower metallicity than regions near the Sun, suggesting differences in the formation and survival of molecules in star-forming regions. To understand chemical evolution across the Milky Way, deriving molecular abundances in star-forming regions in the outer Galaxy is essential for refining models of sub-Solar metallicity environments. We analyzed IRAM 30m observations at 3 and 2 mm toward 35 sources at Galactocentric distances of 9$-$24 kpc, within the "CH…

Is the high-energy environment of K2-18b special?
S. Rukdee, M. G\"udel, I. Vilovi\'c, K. Poppenh\"ager, S. Boro Saikia, J. Buchner, B. Stelzer, G. Roccetti, J. V. Seidel, V. Burwitz
https://arxiv.org/abs/2510.06939

Is the high-energy environment of K2-18b special?
K2-18b lies near the radius valley that separates super-Earths and sub-Neptunes, marking a key transitional regime in planetary and atmospheric composition. The system offers a valuable opportunity to study how M-dwarf high-energy stellar radiation influences atmospheric stability and the potential for sustaining volatile species, especially important in the context of the upcoming ELT and its ANDES spectrograph. This study characterizes the high-energy environment of K2-18 with X-ray observati…

Prospects for compact hexaquarks under the limitation imposed by quark confinement
Wen-Xuan Zhang, Wen-Nian Liu, Duojie Jia
https://arxiv.org/abs/2510.04103 https://

Prospects for compact hexaquarks under the limitation imposed by quark confinement
The limitation of flavor constituents for compact multiquarks is crucial for understanding the strong interaction at the low energy scale. Utilizing the MIT bag model that incorporates perturbative interactions and confinement energy $E_{\rm CON}$, we derive a critical bag radius $R_c=5.61\,$GeV$^{-1}$ from the condition $E_{\rm CON} < 0$ at zero temperature and zero baryon density, which aligns with the string-breaking distance of 1.2--1.4$\,$fm. Applying this framework to 6-, 7-, and 8-quark …

Effective Free Energy Landscapes and Hawking-Page Transitions
Choon-Lin Ho
https://arxiv.org/abs/2509.25039 https://arxiv.org/pdf/2509.25039

Effective Free Energy Landscapes and Hawking-Page Transitions
A recent interesting development on the dynamics of black hole phase transitions, the Hawking-Page transition, has been the so-called Gibbs free energy landscape approach. In this formalism, it is assumed that there exists a canonical ensemble of a series of black hole spacetimes with arbitrary horizon radius at a given ensemble temperature. An off-shell Gibbs free energy is defined for every spacetime state in the ensemble, with the horizon radius treated as the order parameter. The minima (ma…

Existence of Positive Scalar Curvature and Positive Yamabe constant on Hypersurfaces of Noncompact Cylinders
Jie Xu
https://arxiv.org/abs/2509.24016 https://

Existence of Positive Scalar Curvature and Positive Yamabe constant on Hypersurfaces of Noncompact Cylinders
Let $ X $ be an oriented, closed manifold with $ \dim X \geqslant 2 $. Let $ (Z, \partial Z) $ be an oriented, compact manifold with (possibly empty) smooth boundary and $ \dim Z \geqslant 2 $. In this article, we show that if the noncompact cylinder $ X \times \mathbb{R} $ admits a complete Riemannian metric $ g $ with positive injectivity radius and uniformly positive scalar curvature, and that is of bounded geometry or bounded curvature, then $ X $ admits a positive scalar curvature metric w…

Mapping the Nearest Ancient Sloshing Cold Front in the Sky with XMM-Newton
Sheng-Chieh Lin, Yuanyuan Su, Iraj Vaezzadeh, William Forman, Elke Roediger, Charles Romero, Paul Nulsen, Scott W. Randall, John ZuHone, Ralph Kraft, Christine Jones
https://arxiv.org/abs/2510.03150

Mapping the Nearest Ancient Sloshing Cold Front in the Sky with XMM-Newton
The Virgo Cluster is the nearest cool core cluster that features two well-studied sloshing cold fronts at radii of $r \approx 30$ kpc and $r \approx 90$ kpc, respectively. In this work, we present results of XMM-Newton mosaic observations of a third, southwestern, cold front at a radius of $r \approx 250$ kpc, originally discovered with Suzaku. All three cold fronts are likely to be parts of an enormous swirling pattern, rooted in the core. The comparison with a numerical simulation of a binary…

Integrable Spherical Brane Model at Large $N$
Mohsen Gheisarieha, Ramtin M. Yazdi, Arash Arabi Ardehali
https://arxiv.org/abs/2509.23869 https://arxiv.org/…

Integrable Spherical Brane Model at Large $N$
We study one of the simplest integrable two-dimensional quantum field theories with a boundary: $N$ free non-compact scalars in the bulk, constrained non-linearly on the boundary to lie on an $(N-1)$-sphere of radius $1/\sqrt{g}$. The $N=1$ case reduces to the single-channel Kondo problem, while larger $N$ is analogous to multi-channel or higher-spin impurity scenarios. Adding a boundary magnetic field -- a linear boundary coupling to the scalars -- enriches the model's structure while preservi…

Power corrections to the production of a prompt photon in association with a jet in the $N$-jettiness slicing scheme at NLO QCD
Prem Agarwal, Kirill Melnikov, Ivan Pedron
https://arxiv.org/abs/2510.03097

Power corrections to the production of a prompt photon in association with a jet in the $N$-jettiness slicing scheme at NLO QCD
We compute the next-to-leading-power corrections in the $N$-jettiness variable to the production of a prompt photon and a jet at next-to-leading order in perturbative QCD in the $q \bar q$ annihilation channel. We employ the $k_\perp$ jet algorithm and assume that the $N$-jettiness value divided by the jet transverse momentum is the smallest parameter in the problem; in particular it should be small compared to the jet radius $R$.

Very Weak Solutions and Asymptotic Behavior of Leray Solutions to the Stationary Navier-Stokes Equations
Giovanni Paolo Galdi
https://arxiv.org/abs/2510.00265 https://

Very Weak Solutions and Asymptotic Behavior of Leray Solutions to the Stationary Navier-Stokes Equations
Let $\bfu$ be a Leray solution to the Navier-Stokes boundary-value problem in an exterior domain, vanishing at infinity and satisfying the generalized energy inequality. We show that if there exist $R>0$ and ${\sf s}\ge \frac23 q$, $q>6$, such that the $L^{\sf s}-$norm of $\bfu$ on the spherical surface of radius $R$ divided by $R$ is less than a constant depending only on {\sf s} and $q$, then $\bfu(x)$ must decay as $|x|^{-1}$ for $|x|\to\infty$. This result is proved with…

Modeling Emission-Line Surface Brightness in a Multiphase Galactic Wind: An O VI Case Study
Zirui Chen, Zixuan Peng, Kate H. R. Rubin, Timothy M. Heckman, Matthew J. Hayes, Yakov Faerman, Crystal L. Martin, S. Peng Oh, Drummond B. Fielding
https://arxiv.org/abs/2510.02443

Modeling Emission-Line Surface Brightness in a Multiphase Galactic Wind: An O VI Case Study
We present a fast and robust analytic framework for predicting surface brightness (SB) of emission lines in galactic winds as a function of radius up to $\sim 100$ kpc out in the circum-galactic medium. We model multi-phase structure in galactic winds by capturing emission from both the volume-filling hot phase (T $\sim 10^{6-7}$ K) and turbulent radiative mixing layers that host intermediate temperature gas at the boundaries of cold clouds (T $\sim 10^4$ K). Our multi-phase framework makes sig…

Constraining the Neutron-Star Equation of State via Short Gamma-Ray Burst X-ray Afterglows
R. Moradi, Y. Wang, F. Rastegarnia, E. S. Yorgancioglu, Shu-Xu Yi, B. Eslam Panah, S. N. Zhang
https://arxiv.org/abs/2510.01872

Constraining the Neutron-Star Equation of State via Short Gamma-Ray Burst X-ray Afterglows
Recent observations from NICER in X-rays and LIGO/Virgo in gravitational waves have provided critical constraints on the mass, radius, and tidal deformability of neutron stars, imposing stringent limits on the equation of state (EOS) and the behavior of ultra-dense matter. However, several key parameters influencing the EOS, such as the maximum mass of neutron stars, spin-down rates, and the potential role of exotic matter in their cores, remain subject of ongoing debate. Here we present a new …

Intrinsic Heisenberg-type lower bounds on spacelike hypersurfaces in general relativity
Thomas Sch\"urmann
https://arxiv.org/abs/2510.01628 https://ar…

Intrinsic Heisenberg-type lower bounds on spacelike hypersurfaces in general relativity
We prove a coordinate- and foliation-independent Heisenberg-type lower bound for quantum states strictly localized in geodesic balls of radius $r$ on spacelike hypersurfaces of arbitrary spacetimes (with matter and a cosmological constant). The estimate depends only on the induced Riemannian geometry of the slice; it is independent of the lapse, shift, and extrinsic curvature, and controls the canonical momentum variance/uncertainty $σ_p$ by the first Dirichlet eigenvalue of the Laplace-Beltra…

Robust bounds on MACHOs from the faintest galaxies
Peter W. Graham, Harikrishnan Ramani, Maximilian Ruhdorfer
https://arxiv.org/abs/2510.01310 https://arxi…

Robust bounds on MACHOs from the faintest galaxies
We use the dynamical heating of stars in ultrafaint dwarf (UFD) galaxies to set limits on Massive Compact Halo Objects (MACHOs). In our analysis we study the robustness of the bounds under uncertainties in key UFD parameters, such as the half-light radius, stellar velocity dispersion, total halo mass and dark matter and stellar density profiles. We apply this framework to both well-established UFD candidates, as well as the recently discovered UFD candidate Ursa Major III/UNIONS 1. We find that…

The Progenitor of the S147 Supernova Remnant
Elvira Cruz-Cruz, Christopher S. Kochanek
https://arxiv.org/abs/2510.02132 https://arxiv.org/pdf/2510.02132

The Progenitor of the S147 Supernova Remnant
The supernova remnant (SNR) S147 contains the pulsar PSR J0538+2817 and a likely unbound binary companion, HD 37424. It is the only good Galactic candidate for a binary unbound by a core-collapse supernova (SN). Using Gaia DR3 parallaxes and photometry, we select the stars local to SNR S147 in a cylinder with a projected radius of $100$ pc and a parallax range of $0.614 < \varpi < 0.787$ mas (a length of $\simeq 360$ pc). We individually model the most luminous of these stars. The two most lumi…

High Five From ASTEP: Three Validated Planets and Two Eclipsing Binaries in a Diverse Set of Long-Period Candidates
Erika Rea, Maximilian N. G\"unther, George Dransfield, Tristan Guillot, Amaury H. M. J. Triaud, Keivan G. Stassun, Juan I. Espinoza-Retamal, Rafael Brahm, Sol\`ene Ulmer-Moll, Matteo Beltrame, Vincent Deloupy, Mathilde Timmermans, Lyu Abe, Karim Agabi, Philippe Bendjoya, Djamel Mekarnia, Francois-Xavier Schmider, Olga Suarez, Ana M. Heras, Bruno Mer\'in, Fran\c{c…

High Five From ASTEP: Three Validated Planets and Two Eclipsing Binaries in a Diverse Set of Long-Period Candidates
We present the analysis of five long-period TESS Objects of Interest (TOIs), each with orbital periods exceeding one month. Initially identified by the Transiting Exoplanet Survey Satellite (TESS), we extensively monitored these targets with the Antarctic Search for Transiting Exoplanets (ASTEP), supported by other facilities in the TESS Follow-Up (TFOP) network. These targets occupy a relatively underexplored region of the period-radius parameter space, offering valuable primordial probes for …

Feeding frenzy in the mighty black holes: what we could learn from them?
Swayamtrupta Panda, Hygor Benati Gon\c{c}alves, Thaisa Storchi-Bergmann, Marzena \'Sniegowska, Bo\.zena Czerny, Edi Bon, Paola Marziani, Nata\v{s}a Bon, Alberto Rodr\'iguez Ardila, Daniel May, Marcos Fonseca Far\'ia, Luciano Fraga, Francisco Pozo Nu\~nez, Eduardo Ba\~nados, Jochen Heidt, Karla Garnica, Deborah Dultzin

Feeding frenzy in the mighty black holes: what we could learn from them?
Eddington ratio is a paramount parameter governing the accretion history and life cycles of Active Galactic Nuclei (AGNs). This short review presents a multi-faceted view of the importance of the Eddington ratio spanning varied AGN studies. We find that the Eddington ratio is crucial for standardizing the Radius-Luminosity (R-L) relation - a necessary step for employing quasars (QSOs) as standardizable cosmological probes to help clarify the standing of the Hubble tension. In this data-driven e…

$\phi$-Dwarfs: White Dwarfs probe Quadratically Coupled Scalars
Kai Bartnick, Konstantin Springmann, Stefan Stelzl, Andreas Weiler
https://arxiv.org/abs/2509.25305 https://

$ϕ$-Dwarfs: White Dwarfs probe Quadratically Coupled Scalars
We study ultralight scalar fields with quadratic couplings to Standard-Model fermions and derive strong constraints from white-dwarf mass-radius data. Such couplings source scalar profiles inside compact stars, shift fermion masses, and can produce a new ground state of matter. We analyze couplings to electrons and to nucleons, incorporating composition and finite-temperature effects in white dwarf structure and equations of state. We identify two robust observables: (i) forbidden gaps - ranges…

Comment on "Strong lensing and shadow of Ayon-Beato-Garcia (ABG) nonsingular black hole"
M. Fahmi Fauzi
https://arxiv.org/abs/2509.24777 https://…

Comment on "Strong lensing and shadow of Ayon-Beato-Garcia (ABG) nonsingular black hole"
It was suggested by Ramadhan et al. (Eur Phys J C 83:465, 2023) that the Sagittarius A* black hole cannot be modeled by an Ayón-Beato-Garcìa regular black hole due to the incompatible shadow radius. However, they overlooked the distant-observer limit of the correction term in the effective geometry, which renders their calculation invalid. When evaluated correctly, the result reverses the conclusion of the paper. This comment highlights the flaw and demonstrates how to properly compute the sh…

Induced-Flare Candidates from the TESS Mission
Nathan Whitsett, Tansu Daylan
https://arxiv.org/abs/2509.22918 https://arxiv.org/pdf/2509.22918

Induced-Flare Candidates from the TESS Mission
The empirical underabundance of close-in planets with radii 1.5-2.0 times that of the Earth, referred to as the radius irradiation valley, may be linked to the inability of gas dwarfs under certain conditions to retain their volatile envelopes due to photoevaporation or core-powered mass loss. In either case, the extent to which a planet can preserve its atmosphere critically depends on poorly understood planetary magnetism. An effective probe of planetary magnetic fields is the interaction bet…

Supernovae Exploding within Dense Extended Material: Early Emission Regimes and Degeneracies in Parameter Inference from Observations
Tal Wasserman, Eli Waxman
https://arxiv.org/abs/2509.25337

Supernovae Exploding within Dense Extended Material: Early Emission Regimes and Degeneracies in Parameter Inference from Observations
Early light curves of many core-collapse supernovae (SNe) are thought to be powered by the interaction of the shock wave with optically thick extended material, either a bound envelope or preexplosion ejected circumstellar matter (CSM). We analytically analyze the early emission produced by a shock with velocity $v$ traversing a material of mass $M_\mathrm{e}$ and opacity $κ$ extending to radius $R_\mathrm{e}$, and show the emission varies qualitatively with varying $τ_\mathrm{e}=κ\!M_\mathr…