Tootfinder

Universal thermodynamic topological classes of static black holes in Conformal Killing Gravity
Hao Chen, Di Wu, Meng-Yao Zhang, Soroush Zare, Hassan Hassanabadi, Bekir Can L\"utf\"uo\u{g}lu, Zheng-Wen Long
https://arxiv.org/abs/2506.03695

Universal thermodynamic topological classes of static black holes in Conformal Killing Gravity
In this study, we develop a universal thermodynamic topological classes for the static black holes in the context of the Conformal Killing Gravity. Our findings indicate that the Conformal Killing Gravity significantly reconstructs the thermodynamic properties of both the smallest inner black hole state and the largest outer black hole state. Additionally, it considerably alters the thermodynamic stability of black holes across both high-temperature and low-temperature regimes. This analysis sh…

Universal Radial Scaling of Large-Scale Black Hole Accretion for Magnetically Arrested And Rocking Accretion Disks
Aretaios Lalakos, Alexander Tchekhovskoy, Elias R. Most, Bart Ripperda, Koushik Chatterjee, Matthew Liska
https://arxiv.org/abs/2505.23888

Universal Radial Scaling of Large-Scale Black Hole Accretion for Magnetically Arrested And Rocking Accretion Disks
Accretion onto supermassive black holes (BHs) can launch relativistic jets that inject energy and momentum into their surroundings. Understanding how such feedback shapes large-scale accretion is key to bridging observations from galactic scales (e.g., the Bondi radius, $r_{\rm B}$) down to event horizon scales ($r_{\rm g}$), spanning 5-6 orders of magnitude. We tackle this challenge by varying the spatial scale separation across 2-4 orders of magnitude and performing some of the longest contig…

The extinction of the contact process in a one-dimensional random environment with long-range interactions
Pablo A. Gomes, Marcelo R. Hil\'ario, Bernardo N. B. de Lima, Thomas Mountford
https://arxiv.org/abs/2506.17444

The extinction of the contact process in a one-dimensional random environment with long-range interactions
We study the contact process on the long-range percolation cluster on $\mathbb{Z}$ where each edge $\langle i,j \rangle$ is open with probability $|i-j|^{-s}$ for $s> 2$. Using a renormalization procedure we apply Peierls-type argument to prove that the contact process dies out if the transmission rate is smaller than a critical threshold. Our methods involve the control of crossing probabilities for percolation on randomly-stretched lattices as in https://doi.org/10.1214/22-AAP1887.

Hele-Shaw limit of chemotaxis-Navier-Stokes flows
Qingyou He, Ling-Yun Shou, Leyun Wu
https://arxiv.org/abs/2506.11757 https://arxiv.…

Hele-Shaw limit of chemotaxis-Navier-Stokes flows
This paper investigates the connection between the chemotaxis--Navier--Stokes system with porous medium type nonlinear diffusion and the Hele--Shaw problem in $\mathbb{R}^d$ ($d\geq2$). First, we prove the global-in-time existence of weak solutions for the Cauchy problem of the chemotaxis-Navier-Stokes system with the general initial data, uniformly in the diffusion range $m\in [3,\infty)$. Then, we rigorously justify the Hele--Shaw limit for this system as $m\rightarrow\infty$, showing the con…

Exploring the role of accretion disk geometry in shaping black hole shadows
Zi-Liang Wang
https://arxiv.org/abs/2506.21148 https://ar…

Exploring the role of accretion disk geometry in shaping black hole shadows
We study black hole imaging in the context of geometrically thick accretion disks in Schwarzschild spacetime. By decomposing the emitting region into a set of one-dimensional luminous segments, each characterized by its inclination angle and inner radius, we construct transfer functions that capture key image features-namely, the direct image, lensing ring, and photon ring. This approach allows a unified treatment of disk geometry and viewing angle. We explore three regimes: optically thin, opt…

Discovery of an HI 21 cm absorption system at z=2.327 with CHIME
CHIME Collaboration, Mandana Amiri, Arnab Chakraborty, Simon Foreman, Mark Halpern, Alex S. Hill, Gary Hinshaw, Carolin Hofer, Albin Joseph, Joshua MacEachern, Kiyoshi W. Masui, Juan Mena-Parra, Arash Mirhosseini, Ue-Li Pen, Tristan Pinsonneault-Marotte, Alex Reda, J. Richard Shaw, Seth R. Siegel, Yukari Uchibori, Rik van Lieshout, Haochen Wang, Dallas Wulf

Discovery of an HI 21 cm absorption system at z=2.327 with CHIME
We report the detection of a new HI absorption system associated with the radio source NVSS J164725+375218 at a redshift of z=2.327, identified through a blind survey conducted by the Canadian Hydrogen Intensity Mapping Experiment (CHIME). This marks the fifth detection of an associated system at z > 2. By analyzing a subset of available data, we conducted a blind survey for HI absorption systems within the redshift range of 0.78 to 2.55 along 202 lines of sight in the declination range of 35 t…

An Ejection Event Captured by VLBI During the Outburst of Swift J1727.8$-$1613
Hongmin Cao, Jun Yang, S\'andor Frey, Callan M. Wood, James C. A. Miller-Jones, Krisztina \'E. Gab\'anyi, Giulia Migliori, Marcello Giroletti, Lang Cui, Tao An, Xiaoyu Hong, Weihua Wang
https://arxiv.org/abs/2506.18817

An Ejection Event Captured by VLBI During the Outburst of Swift J1727.8$-$1613
We observed a newly-discovered Galactic black hole X-ray binary Swift J1727.8$-$1613 with the European Very Long Baseline Interferometry Network (EVN) at 5 GHz. The observation was conducted immediately following a radio quenching event detected by the Karl G. Jansky Very Large Array (VLA). The visibility amplitude evolution over time reveals a large-amplitude radio flare and is consistent with an ejection event. The data can be interpreted either as a stationary component (i.e., the radio core…

Fermi surface and effective masses of IrO$_2$ probed by de Haas-van Alphen quantum oscillations
Kathrin G\"otze, Matthew J. Pearce, Suchit Negi, Jian-Rui Soh, Dharmalingam Prabhakaran, Paul A. Goddard
https://arxiv.org/abs/2506.09815

Fermi surface and effective masses of IrO$_2$ probed by de Haas-van Alphen quantum oscillations
Iridium-containing conducting materials are widely investigated for their strong spin-orbit coupling and potential topological properties. Recently the commonly used electrode material iridium dioxide was found to host a large spin-Hall conductivity and was shown to support Dirac nodal lines. Here we present quantum-oscillation experiments on high-quality IrO$_2$ single crystals using the de Haas-van Alphen effect measured using torque magnetometry with a piezo-resistive microcantilever as well…

Universality on thermodynamic relation with corrections in Einstein-Bel-Robinson gravity Black hole
Hai-Long Zhen, Huai-Fan Li, Yu-Bo Ma
https://arxiv.org/abs/2506.08466

Universality on thermodynamic relation with corrections in Einstein-Bel-Robinson gravity Black hole
The generalized thermodynamic extremum relation, as proposed by Goon and Penco, establishes a novel theoretical framework for the study of spacetime thermodynamics. However, extant investigations generally assume that the black hole state parameter is solely a first-order function of the perturbation parameter when exploring the Goon-Penco relation in diverse spacetime contexts. An analytic expression for the perturbation parameter as a function of the black hole entropy can be expressed by tre…

Exploration of features in the black hole mass spectrum inspired by non-parametric analyses of gravitational wave observations
Stefano Rinaldi, Yajie Liang, Gabriele Demasi, Michela Mapelli, Walter Del Pozzo
https://arxiv.org/abs/2506.05929

Exploration of features in the black hole mass spectrum inspired by non-parametric analyses of gravitational wave observations
Current gravitational-wave data reveal structures in the mass function of binary compact objects. Properly modelling and deciphering such structures is the ultimate goal of gravitational-wave population analysis: in this context, non-parametric models are a powerful tool to infer the distribution of black holes from gravitational waves without committing to any specific functional form. Here, we aim to quantitatively corroborate the findings of non-parametric methods with parametrised models in…