Tootfinder

EIGER VIII: First stars signatures in the connection between OI absorption and Galaxies in the Epoch of Reionization
Jack Higginson, Rongmon Bordoloi, Robert A. Simcoe, Jorryt Matthee, Daichi Kashino, Ruari Mackenzie, Ivan Kramarenko, Simon J. Lilly, Anna-Christina Eilers, Rohan P. Naidu, Minghao Yue
https://arxiv.org/abs/2510.05220…

EIGER VIII: First stars signatures in the connection between OI absorption and Galaxies in the Epoch of Reionization
We investigate the association between galaxies and neutral OI absorption systems at z~6, which trace metal-enriched gas during the epoch of reionization. We identify 40 galaxies across six quasar fields, residing in 15 overdensities within 300 kpc of the background sightlines. Five OI absorption systems are associated with five of these overdensities, yielding a covering fraction of $0.27^{+0.13}_{-0.10}$ within 300 kpc. The absorption occurs beyond typical virial radii, indicating that the ga…

Declining metallicity and extended HeII in the outflow of an epoch of reionization analogue galaxy
M. J. Hamel-Bravo, D. B. Fisher, D. A. Berg, A. J. Cameron, J. Chisholm, G. G. Kacprzak, B. Mazzilli Ciraulo, H. Katz
https://arxiv.org/abs/2510.05332

Declining metallicity and extended HeII in the outflow of an epoch of reionization analogue galaxy
We present VLT/X-shooter spectroscopy of the extremely metal-poor starburst galaxy SBS 0335-052E, a nearby (D $\sim$54 Mpc) analog of high-redshift systems, probing its outflow up to a distance of $\sim$2.6 kpc. Using direct-method oxygen abundances, we find a complex metallicity profile that generally declines with distance, decreasing by 0.37 dex from the galaxy center out to 2.4 kpc into the outflow. This implies a metal-loading factor roughly an order of magnitude lower than predictions bas…

CONCERTO: forward modeling of interferograms for calibration
A. Lundgren, A. Beelen, G. Lagache, F. -X. Desert, A. Fasano, J. Macias-Perez, A. Monfardini, P. Ade, M. Aravena, E. Barria, A. Benoit, M. Bethermin, J. Bounmy, O. Bourrion, G. Bres, C. De Breuck, M. Calvo, A. Catalano, C. Dubois, C. A Duran, T. Fenouillet, J. Garcia, G. Garde, J. Goupy, C. Hoarau, W. Hu, J. -C. Lambert, F. Levy-Bertrand, J. Marpaud, R. Parra, G. Pisano, N. Ponthieu, L. Prieur, D. Quinatoa, S. Roni, S. Roudie…

CONCERTO: forward modeling of interferograms for calibration
The CarbON [CII] line in post-rEionisation and ReionisaTiOn epoch (CONCERTO) instrument is a low-resolution mapping Fourier-transform spectrometer, based on lumped-element kinetic inductance detector (LEKID) technology, operating at 130- 310 GHz. It was installed on the 12-meter APEX telescope in Chile in April 2021 and operated until December 2022. CONCERTO's main science goal is to constrain the [CII] line fluctuations at high redshift. To reach that goal CONCERTO observed 1.4 deg2 in the COS…

The teachings of Falun Gong stem entirely from its enigmatic leader,
Li Hongzhi, whom followers view as a “God-like figure.”
Since settling in the United States in the late 1990s, Li has remained reclusive, but his beliefs shape the core tenets of Falun Gong and its many tendrils:
in addition to traditional Buddhist practices like qigong, a type of movement-based meditation,
Falun Gong also teaches that homosexuality creates “bad karma” and is “comparable to organize…

La Belle Epoch | Los Angeles Review of Books
Arielle Gordon traces the rise of “The Epoch Times” through her grandmother’s text messages.

Luminosity distance dispersion in Swiss-cheese cosmology as a function of the hole size distribution
Thippayawis Cheunchitra, Andrew Melatos, Rachel Webster
https://arxiv.org/abs/2510.05579

Luminosity distance dispersion in Swiss-cheese cosmology as a function of the hole size distribution
The luminosity distance-redshift ($D_{\rm L}$--$z$) relation derived from Type Ia supernovae (SNe Ia) yields evidence for a nonzero cosmological constant. SNe Ia analyses typically fit to the functional form $D_{\rm L}(z)$ derived theoretically from the homogeneous and isotropic Friedmann-Lemaitre-Robertson-Walker (FLRW) metric. Yet, the metric in the epoch relevant to SNe Ia measurements deviates slightly from FLRW due to gravitational clumping of mass into large-scale structures like filament…

Andrew Thornebrooke, an Epoch Times national security reporter, resigns over its decision to sign the Pentagon's new policy and label antifa as a terrorist org (Ken Bensinger/New York Times)
https://www.nytimes.com/…

Epoch Times Reporter Resigns After Publication Signs Pentagon Rules
The reporter, Andrew Thornebrooke, also cited a recent editorial directive to refer to antifa, the far-left ideological movement, as a terrorist organization.

Rapid onset of a Comptonisation zone in the repeating tidal disruption event XMMSL2 J140446.9-251135
R. D. Saxton, T. Wevers, S. van Velzen, K. Alexander, Z. Liu, A. Mummery, M. Giustini, G. Miniutti, F. Fuerst, J. J. E. Kajava, A. M. Read, P. G. Jonker, A. Rau, D. -Y. Li
https://arxiv.org/abs/2510.02905

Rapid onset of a Comptonisation zone in the repeating tidal disruption event XMMSL2 J140446.9-251135
We report here on observations of a tidal disruption event, XMMSL2 J1404-2511, discovered in an XMM-Newton slew, in a quiescent galaxy at z=0.043. X-ray monitoring covered the epoch when the accretion disc transitioned from a thermal state, with kT~80 eV, to a harder state dominated by a warm, optically-thick corona. The bulk of the coronal formation took place within 7 days and was coincident with a temporary drop in the emitted radiation by a factor 4. After a plateau phase of ~100 days, the …

Taming the One-Epoch Phenomenon in Online Recommendation System by Two-stage Contrastive ID Pre-training
Yi-Ping Hsu, Po-Wei Wang, Chantat Eksombatchai, Jiajing Xu
https://arxiv.org/abs/2508.18700

Taming the One-Epoch Phenomenon in Online Recommendation System by Two-stage Contrastive ID Pre-training
ID-based embeddings are widely used in web-scale online recommendation systems. However, their susceptibility to overfitting, particularly due to the long-tail nature of data distributions, often limits training to a single epoch, a phenomenon known as the "one-epoch problem." This challenge has driven research efforts to optimize performance within the first epoch by enhancing convergence speed or feature sparsity. In this study, we introduce a novel two-stage training strategy that incorporat…

An Open-Access Web Tool for Light Curve Simulation and Analysis of Small Solar System Objects
J. L. Rizos, J. L. Ortiz, P. J. Gutierrez, I. M. Navajas, L. M. Lara
https://arxiv.org/abs/2510.03192

An Open-Access Web Tool for Light Curve Simulation and Analysis of Small Solar System Objects
We present a web-based application designed to simulate rotational light curves of small airless Solar System bodies under user-defined geometrical and physical conditions. The tool integrates both physical and empirical photometric models and enables users to input custom shape models, surface properties, and viewing geometries. A dedicated module also computes projected silhouettes at the epoch of stellar occultations, allowing direct comparison with observed chords. The application, develope…

The Cosmic Infrared Background Experiment-2: An Intensity Mapping Optimized Sounding-rocket Payload to Understand the Near-IR Extragalactic Background Light
Michael Zemcov, James J. Bock, Asantha Cooray, Shuji Matsuura, Dae-Hee Lee, Candice Fazar, Richard M. Feder, Grigory Heaton, Ryo Hashimoto, Phillip Korngut, Toshio Matsumoto, Chi H. Nguyen, Kazuma Noda, Won-Kee Park, Kei Sano, Kohji Takimoto, Toshiaki Arai, Seung-Cheol Bang, Priyadarshini Bangale, Masaki Furutani, Viktor Hristov, Y…

The Cosmic Infrared Background Experiment-2: An Intensity Mapping Optimized Sounding-rocket Payload to Understand the Near-IR Extragalactic Background Light
The background light produced by emission from all sources over cosmic history is a powerful diagnostic of structure formation and evolution. At near-infrared wavelengths, this extragalactic background light (EBL) is comprised of emission from galaxies stretching all the way back to the first-light objects present during the Epoch of Reionization. The Cosmic Infrared Background Experiment 2 (CIBER-2) is a sounding-rocket experiment designed to measure both the absolute photometric brightness of…

A threat actor is offering a database allegedly belonging to a far-right media outlet The Epoch Times.
Its 32 million records have been purportedly exposed.
https://cybernews.com/cybercrime/epoch-times-data-breach-subscriber-information/

Epoch Times Reporter Resigns After Publication Signs Pentagon Rules (Ken Bensinger/New York Times)
https://www.nytimes.com/2025/10/19/business/media/epoch-times-pentagon-press-rules.html
http://www.memeorandum.com/251019/p43#a251019p43

The New York Times: Epoch Times Reporter Resigns After Publication Signs Pentagon Rules
The reporter, Andrew Thornebrooke, also cited a recent editorial directive to refer to antifa, the far-left ideological movement, as a terrorist organization.
https://social.trom.tf/display/dbc8dc4

NYT: Epoch Times Reporter Resigns After Publication Signs Pentagon Rules
The New York Times: Epoch Times Reporter Resigns After Publication Signs Pentagon Rules The reporter, Andrew Thornebrooke, also cited a recent editorial dire...

#GiftLink
Whoa: Epoch Times Reporter Resigns After Publication Signs Pentagon Rules - The New York Times
https://www.nytimes.com/2025/10/19/business/media/epoch-times-pentagon-press-rules.html?unlocked_article_code=1.uk8.qMNz.yFqnLJ-bDKTh&smid=url-share

Improved Limits on the 21 cm Signal at z = 6.5–7.0 (the Epoch of #Reionization) with the Murchison Widefield Array Using Gaussian Information: https://iopscience.iop.org/article/10.3847/1538-4357/adff80 -> Astronomers hunting for evidence of the light from the first stars and galaxies have found that the Universe was warm, rather than cold, before it “lit up”: https://www.icrar.org/eor-limit/

Enhancing the detectability of ionized Regions during the Epoch of Reionization
Rutvik Ashish Mahajan, Raghunath Ghara, Nishant Pradeep Deo, Arnab Mishra
https://arxiv.org/abs/2509.02148

Enhancing the detectability of ionized Regions during the Epoch of Reionization
We present an improved matched filter method for detecting large ionized regions in 21 cm observations of the Epoch of Reionization. In addition to detection, the method constrains the properties of these regions, offering insights into the underlying source populations. Extending a previously developed Bayesian framework, we replace the spherical filter with an eight-parameter spheroidal filter, enabling a more flexible characterization of ionized bubbles. This enhancement significantly improv…

from my link log —
Mechanical watch: exploded view.
https://fellerts.no/projects/epoch.html
saved 2025-06-24 https://

Direct measurement of ISM proper motion with image registration
M. Piecka, L. Posch, S. Meingast, S. Hutschenreuter, A. Rottensteiner, J. Alves
https://arxiv.org/abs/2509.04857 …

Direct measurement of ISM proper motion with image registration
To date, quantification of the on-sky motion for interstellar clouds have relied on proxies such as young stellar objects (YSO) and masers. We present the first direct measurement of an interstellar cloud proper motion using the VISTA Star Formation Atlas (VISIONS) multi-epoch infrared images of the Corona Australis star-forming region. Proper motions are extracted by tracking the morphology of extended structures in the cloud complex based on image registration techniques implemented in Simple…

Replaced article(s) found for astro-ph.HE. https://arxiv.org/list/astro-ph.HE/new
[1/1]:
- Assessing the Role of Intrinsic Variability in Black Hole Parameter Inference using Multi-Epoch E...
Dominic O. Chang, Micael D. Johnson, Paul Tiede

Enhanced Matter Power Spectrum from Axion Kination after Big Bang Nucleosynthesis
Raymond T. Co, Nicolas Fernandez, Akshay Ghalsasi, Keisuke Harigaya, Jessie Shelton
https://arxiv.org/abs/2510.01308

Enhanced Matter Power Spectrum from Axion Kination after Big Bang Nucleosynthesis
Despite stringent constraints from Big Bang Nucleosynthesis (BBN) and cosmic microwave background (CMB) observations, it is still possible for well-motivated particle physics models to substantially alter the cosmic expansion history between BBN and recombination. In this work we consider two different axion models that can realize a period of first matter domination, then kination, in this epoch. We perform fits to both primordial element abundances as well as CMB data and determine that up to…

GirlsDoPorn Victims Sue Major Payment Processors, Claiming They Enabled Sex Trafficking https://www.404media.co/girlsdoporn-victims-sue-major-payment-processors-ccbill-epoch/

CosmoUiT: A Vision Transformer-UNet Hybrid for Fast and Accurate Emulation of 21-cm Maps from the Epoch of Reionization
Prasad Rajesh Posture, Yashrajsinh Mahida, Suman Majumdar, Leon Noble
https://arxiv.org/abs/2510.01121

CosmoUiT: A Vision Transformer-UNet Hybrid for Fast and Accurate Emulation of 21-cm Maps from the Epoch of Reionization
The observation of the redshifted 21-cm signal from the intergalactic medium will probe the epoch of reionization (EoR) with unprecedented detail. Various simulations are being developed and used to predict and understand the nature and morphology of this signal. However, these simulations are computationally very expensive and time-consuming to produce in large numbers. To overcome this problem, an efficient field-level emulator of this signal is required. However, the EoR 21-cm signal is high…

Ich habe gerade in einem Handy-Spiel Werbung für ein Abo der Epoch Times bekommen ...

TES Bolometer Design and Testing for the Tomographic Ionized-carbon Mapping Experiment Millimeter Array
Victoria L. Butler, James J. Bock, Dongwoo T. Chung, Abigail T. Crites, King Lau, Ian Lowe, Dan P. Marrone, Evan C. Mayer, Benjamin J. Vaughan, Michael Zemcov
https://arxiv.org/abs/2510.02459

TES Bolometer Design and Testing for the Tomographic Ionized-carbon Mapping Experiment Millimeter Array
Transition Edge Sensor (TES) bolometers are a well-established technology with a strong track record in experimental cosmology, making them ideal for current and future radio astronomy instruments. The Tomographic Ionized-carbon Mapping Experiment (TIME), in collaboration with JPL, has developed advanced silicon nitride leg isolated superconducting titanium detectors for 200 to 300 GHz observations of the Epoch of Reionization. Compared to their MHz counterparts, bolometers operating in this fr…

Pricing American Options Time-Capped by a Drawdown Event
Zbigniew Palmowski, Pawe{\l} St\c{e}pniak
https://arxiv.org/abs/2509.00999 https://arxiv.org/pdf/2…

Pricing American Options Time-Capped by a Drawdown Event
This paper presents a derivation of the explicit price for the perpetual American put option in the Black-Scholes model, time-capped by the first drawdown epoch beyond a predefined level. We demonstrate that the optimal exercise strategy involves executing the option when the asset price first falls below a specified threshold. The proof relies on martingale arguments and the fluctuation theory of Lévy processes. To complement the theoretical findings, we provide numerical analysis.

Here is some useful and wise advice for living in the 21st-century surveillance-state epoch: https://aphyr.com/posts/395-geoblocking-multiple-localities-with-nginx

Just finished "The Courageous Princess" by Rod Espinosa. It's... bad. I was really looking forward to it because I recently read "Castle Waiting" by Linda Medley, and it seemed from the cover like it might be from a similar epoch in comics and/or have similar vibes, but it's both a very bland story, and extremely into royalty apologetics, which is the opposite of Castle Waiting and which galls me immensely. It breaks exactly one genre convention (the princess gets fed up with waiting for a prince and rescues herself) but doesn't systematize that into even an ounce of feminism.
"Dealing With Dragon"s by Patricia Wrede is the actually amazing version of this story, although it's not a graphic novel.
#AmReading

Doc: 15 people signed the Pentagon's press rules, including from The Federalist, The Epoch Times, OANN, and overseas media, plus freelancers and independents (Scott Nover/Washington Post)
https://www.washingtonpost.com/business/20

Hundreds of people cover the Pentagon. These are the 15 who signed its new press policy.
The Federalist, the Epoch Times, and One America News signed the Defense Department’s press rules. The rest are freelancers, independent or work for media outfits based overseas.

Neutral hydrogen in and around galaxies during the Epoch of Reionization
V. Gelli, C. Mason, A. Pallottini, K. E. Heintz, Z. Chen, V. D'Odorico, A. Ferrara, J. Fynbo, M. Kohandel, C. L. Pollock, C. Robinson, S. Salvadori
https://arxiv.org/abs/2510.01315

Neutral hydrogen in and around galaxies during the Epoch of Reionization
JWST spectra revealing Lyman-$α$ (Ly$α$) absorption in $z\sim 5-14$ galaxies offer a unique probe of reionization's earliest stages. However, disentangling absorption by the increasingly neutral intergalactic medium (IGM) from that in galaxies' interstellar and circumgalactic medium (ISM, CGM) remains challenging due to the poorly constrained nature of neutral hydrogen (HI) in and around galaxies at these redshifts. We use the SERRA high-resolution cosmological zoom-in simulations to characte…

Pricing American options time-capped by a drawdown even in a L\'evy market
Zbigniew Palmowski, Pawe{\l} St\c{e}pniak
https://arxiv.org/abs/2508.20677 https://

Pricing American options time-capped by a drawdown even in a Lévy market
This paper presents a derivation of the explicit price for the perpetual American put option time-capped by the first drawdown epoch beyond a predefined level. We consider the market in which an asset price is described by geometric Lévy process with downward exponential jumps. We show that the optimal stopping rule is the first time when the asset price gets below a special value. The proof relies on martingale arguments and the fluctuation theory of Lévy processes. We also provide a numeric…

Axion-Photon Conversion In Magnetized Universe: Impact On The Global 21-cm Signal
Pravin Kumar Natwariya, Vivekanand Mohapatra, Hriditi Howlader
https://arxiv.org/abs/2509.04237

Axion-Photon Conversion In Magnetized Universe: Impact On The Global 21-cm Signal
The reported anomalous global 21-cm signal $(T_{21})$ from the cosmic dawn era by Experiment to Detect the Global Epoch of Reionisation Signature (EDGES) could hint towards new physics beyond the standard model. The resonant conversion of the axion-like particles (ALPs) into photons in the presence of primordial magnetic fields (PMFs) could be a viable solution. However, the strength of the PMFs can change over the time as they can decay by ambipolar diffusion and turbulent decay. Consequently,…

Confronting Rainbow-deformed $f(R)$ Gravity with the ACT Data
S. D. Odintsov, V. K. Oikonomou
https://arxiv.org/abs/2508.17358 https://arxiv.org/pdf/2508.1…

Confronting Rainbow-deformed $f(R)$ Gravity with the ACT Data
In this work we examine a theoretical scenario which combines two fundamental theoretical proposals for the early Universe and a possible evolution for the early post-inflationary epoch. Specifically, we assume that the early Universe contains gravity's rainbow effects on the spacetime and the inflationary Lagrangian contains $R^2$ corrections or $f(R)$ gravity corrections in general. In addition we assume that the era beyond the end of inflation until the reheating temperature is reached, is a…

Deep Temporal Graph Networks for Real-Time Correction of GNSS Jamming-Induced Deviations
Ivana Kesi\'c, Alja\v{z} Blatnik, Carolina Fortuna, Bla\v{z} Bertalani\v{c}
https://arxiv.org/abs/2509.14000

Deep Temporal Graph Networks for Real-Time Correction of GNSS Jamming-Induced Deviations
Global Navigation Satellite Systems (GNSS) are increasingly disrupted by intentional jamming, degrading availability precisely when positioning and timing must remain operational. We address this by reframing jamming mitigation as dynamic graph regression and introducing a receiver-centric deep temporal graph network that predicts, and thus corrects, the receivers horizontal deviation in real time. At each 1 Hz epoch, the satellite receiver environment is represented as a heterogeneous star gra…

Determining Ideal Fields for Epoch of Reionisation Science Using the 21 cm Line
E. Jong, C. Trott, C. D. Nunhokee, Q. Zheng
https://arxiv.org/abs/2509.19751 https://

Determining Ideal Fields for Epoch of Reionisation Science Using the 21 cm Line
The upcoming Square Kilometre Array Low Frequency (SKA-Low) interferometer will have the required sensitivity to detect the 21 cm line from neutral hydrogen during the Epoch of Reionisation (EoR). In preparation, we investigated the suitability of different fields for EoR science with the 21~cm line, using existing observations of candidate fields from the Murchison Widefield Array (MWA). Various image and calibration metrics were extracted from archival MWA observations centred on $z \sim 6.8$…

Post-Reheating Inflaton Production as a Probe of Reheating Dynamics
Kunio Kaneta, Tomo Takahashi, Natsumi Watanabe
https://arxiv.org/abs/2508.20402 https://

Post-Reheating Inflaton Production as a Probe of Reheating Dynamics
Cosmological reheating bridges the inflationary epoch and the hot big bang phase, yet its underlying dynamics remain poorly understood. In this work, we investigate a minimal scenario in which the inflaton evolves under a simple power-law potential during reheating and interacts with other particles via renormalizable couplings. We show that inflaton quanta can be regenerated from the thermal bath even after the decay of the coherent inflaton field, unveiling a previously overlooked channel for…

Setchain Algorithms for Blockchain Scalability
Arivarasan Karmegam, Gabina Luz Bianchi, Margarita Capretto, Mart\'in Ceresa, Antonio Fern\'andez Anta, C\'esar S\'anchez
https://arxiv.org/abs/2509.09795

Setchain Algorithms for Blockchain Scalability
Setchain has been proposed to increase blockchain scalability by relaxing the strict total order requirement among transactions. Setchain organizes elements into a sequence of sets, referred to as epochs, so that elements within each epoch are unordered. In this paper, we propose and evaluate three distinct Setchain algorithms, that leverage an underlying block-based ledger. Vanilla is a basic implementation that serves as a reference point. Compresschain aggregates elements into batches, and c…

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446 4633
Taichi Uyama, Masayuki Kuzuhara, Charles Beichman, Teruyuki Hirano, Takayuki Kotani, Qier An, Timothy D. Brandt, Markus Janson, Dimitri Mawet, Mayuko Mori, Bun'Ei Sato, Denitza Stoeva, Motohide Tamura, Masataka Aizawa, Bryson Cale, Thomas Henning, Hiroyuki Tako Ishikawa, Norio Narita, Masahiro Ogihara, Aniket Sanghi, T…

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633
We report the discovery of a new directly-imaged brown dwarf companion with Keck/NIRC2+pyWFS around a nearby mid-type M~dwarf LSPM~J1446+4633 (hereafter J1446). The $L'$-band contrast ($4.5\times10^{-3}$) is consistent with a $\sim20-60\ M_{\rm Jup}$ object at 1--10~Gyr and our two-epoch NIRC2 data suggest a $\sim30\%$ ($\sim3.1σ)$ variability in its $L'$-band flux. We incorporated Gaia DR3 non-single-star catalog into the orbital fitting by combining the Subaru/IRD RV monitoring results, NIRC…

Primordial Physics in the Nonlinear Universe: mapping cosmological collider models to weak-lensing observables
Dhayaa Anbajagane, Hayden Lee
https://arxiv.org/abs/2509.02693 htt…

Primordial Physics in the Nonlinear Universe: mapping cosmological collider models to weak-lensing observables
Primordial non-Gaussianities (PNGs) are features in the initial density field that provide a window into the nonlinear dynamics of particles during the inflationary epoch. Among them, a distinctive set of signatures from "cosmological collider physics" originates through interactions of the inflaton with heavy particles active at high energies. The amplitude and form of these signatures depend on the strength and nature of the interactions. The corresponding features in large-scale structure ha…

Single Epoch Measurements of Dispersion Measure Gradients Towards PSR B0834 06
Daniel Baker, Ue-Li Pen
https://arxiv.org/abs/2508.15270 https://arxiv.org/p…

Single Epoch Measurements of Dispersion Measure Gradients Towards PSR B0834+06
Understanding the evolution of pulsar dispersion measures is vital to high precision timing experiments, as well as astrometric experiments to determine pulsar positions and proper motions. In this work, we present a novel approach to measuring dispersion measure gradients using pulsar scintillometry. This approach makes use of the multipath propagation through the interstellar medium to simultaneously probe dispersion measures along multiple sight lines from a single observation. Using existin…

Momentum transfer coefficient constraints for the 2024 PDC25 Hypothetical Asteroid Impact Scenario
Christoph M. Sch\"afer, Uri Malamud, Tamir Manoach, Hagai B. Perets
https://arxiv.org/abs/2509.19000

A High Incidence of Mid-infrared Variability in Local Ultraluminous Infrared Galaxies
Shun Hatano, Masatoshi Imanishi, Takanobu Kirihara, Takashi Yamamoto, Yuxing Zhong, Chenghao Zhu
https://arxiv.org/abs/2509.02254

A High Incidence of Mid-infrared Variability in Local Ultraluminous Infrared Galaxies
We explore mid-infrared (MIR) variability in local ultraluminous infrared galaxies (ULIRGs; infrared luminsoity $L_{\rm IR}>10^{12}\ L_\odot$) utilizing the $\sim$11 years of photometry from the NEOWISE multi-epoch catalog of {\it Wide-field Infrared Survey Explorer} ({\it WISE}). We identify 30 variable ULIRGs with statistically significant MIR variability. The variability is observed on timescales of a few years, implying that the MIR-emitting regions are compact ($\lesssim 1$ pc). The differ…

Cosmological viability of anisotropic inflation in Thurston spacetimes
Devika J. S., Tanay Gupta, Sukanta Panda
https://arxiv.org/abs/2509.16553 https://ar…

Cosmological viability of anisotropic inflation in Thurston spacetimes
The introduction of anisotropy into large scale geometry of the universe has led to the development of Thurston spacetimes possessing an inherent anisotropic curvature in them. Studies related to these anisotropic spacetimes have revealed how they could explain the evolutionary dynamics and light propagation in the universe. Here, we consider these spacetimes under the inflationary epoch to examine whether we could address the possibility of anisotropic inflation in the universe. Researches hav…

A Compact Symmetric Object Discovered by the VLA Low-band Ionosphere and Transient Experiment
Kristina Nyland, Mary Rachelle Barrett, Genna Crom, Pallavi Patil, Emil Polisensky, Wendy Peters, Simona Giacintucci, Tracy Clarke, Mark Lacy, Shyaam Mukundan, Dillon Z. Dong, Andy Goulding, Amy E Kimball, Magdalena Kunert-Bajraszewska
https://arx…

A Compact Symmetric Object Discovered by the VLA Low-band Ionosphere and Transient Experiment
We present new Very Long Baseline Array (VLBA) imaging of a MHz-peaked spectrum (MPS) source that was found using commensal low-frequency data taken with the Karl G. Jansky Very Large Array (VLA). The source, J0330-2730, was identified in multi-epoch data from the VLA Low-band Ionosphere and Transient Experiment (VLITE). VLITE continuously collects low-frequency data at 340 MHz during regular VLA observations. Our analysis of the VLITE light curve demonstrates that J0330-2730 has significant 34…

Gravitational Wave Signatures from Lepton Number Breaking Phase Transitions with Flat Potentials
Gabriela Barenboim, Yeji Park, Liliana Velasco-Sevilla
https://arxiv.org/abs/2510.11913

Gravitational Wave Signatures from Lepton Number Breaking Phase Transitions with Flat Potentials
Extensions of the Standard Model typically contain ``flaton fields" defined as fields with large vacuum expectation values and almost flat potentials where scalar self-coupling is small or vanishes at tree level. Such potentials have been used to drive a secondary inflationary epoch after a primary phase of inflation, in what are called thermal inflation models. Although the primordial, high-scale inflationary epoch can solve the horizon and flatness problems, it does not always resolve difficu…

Using Neural Emulators and Hamiltonian Monte Carlo to constrain the Epoch of Reionization's History with the Ly$\alpha$ Forest Power Spectrum
Diego Gonz\'alez-Hern\'andez, Caitlin Doughty, Molly Wolfson, Joseph F. Hennawi, Zhenyu Jin
https://arxiv.org/abs/2509.13498

Using Neural Emulators and Hamiltonian Monte Carlo to constrain the Epoch of Reionization's History with the Ly$α$ Forest Power Spectrum
The Lyman-alpha (Ly$α$) forest at $z \sim 5$ offers a primary probe to constrain the history of the Epoch of Reionization (EoR), retaining thermal and ionization signatures imprinted by the reionization process. In this work, we present a new inference framework based on JAX that combines forward-modeled Ly$α$ forest observables with differentiable neural emulators and Hamiltonian Monte Carlo (HMC). We construct a dataset of 501 low-resolution simulations generated with user-defined reionizat…

A comprehensive view of PKS 2155-304 from 2008 to 2023 through a multi-epoch modeling of its spectral energy distributions
G. Harutyunyan, N. Sahakyan, D. B\'egu\'e, M. Khachatryan
https://arxiv.org/abs/2509.11827

A comprehensive view of PKS 2155-304 from 2008 to 2023 through a multi-epoch modeling of its spectral energy distributions
We present a detailed investigation of the temporal and spectral evolution of the emission from the blazar PKS 2155-304, a high-synchrotron-peaked (HSP) blazar. Using $γ$-ray, X-ray, optical/UV, and infrared data assembled from the Markarian Multiwavelength Data Center, we constructed multi-band light curves and temporally resolved spectral energy distributions (SEDs) of PKS 2155-304 to probe the origin of its emission. The light curves show significant variability, with fractional variability…

An Efficient Shift-and-Stack Algorithm Applied to Detection Catalogs
Steven Stetzler, Mario Juri\'c, Pedro H. Bernardinelli, Dino Bekte\v{s}evi\'c, Colin Orion Chandler, Andrew J. Connolly, Fred C. Adams, Cesar Fuentes, David W. Gerdes, Matthew J. Holman, Hsing Wen Lin, Larissa Markwardt, Andrew McNeill, Michael Mommert, Kevin J. Napier, William J. Oldroyd, Matthew J. Payne, Andrew S. Rivkin, Luis E. Salazar-Manzano, Hilke Schlichting, Scott S. Sheppard, Dallin Spencer, Ryder S…

An Efficient Shift-and-Stack Algorithm Applied to Detection Catalogs
The boundary of solar system object discovery lies in detecting its faintest members. However, their discovery in detection catalogs from imaging surveys is fundamentally limited by the practice of thresholding detections at signal-to-noise (SNR) $\geq 5$ to maintain catalog purity. Faint moving objects can be recovered from survey images using the shift-and-stack algorithm, which coadds pixels from multi-epoch images along a candidate trajectory. Trajectories matching real objects accumulate s…

A GLIMPSE of Intermediate Mass Black holes in the epoch of reionization: Witnessing the Descendants of Direct Collapse?
Qinyue Fei, Seiji Fujimoto, Rohan P. Naidu, John Chisholm, Hakim Atek, Gabriel Brammer, Yoshihisa Asada, Volker Bromm, Lukas J. Furtak, Jenny E. Greene, Tiger Yu-Yang Hsiao, Junehyoung Jeon, Vasily Kokorev, Jorryt Matthee, Priyamvada Natarajan, Johan Richard, Alberto Saldana-Lopez, Daniel Schaerer, Marta Volonteri, Adi Zitrin

A GLIMPSE of Intermediate Mass Black holes in the epoch of reionization: Witnessing the Descendants of Direct Collapse?
JWST has revealed an abundance of supermassive black holes (BHs) in the early Universe, and yet the lowest mass seed black holes that gave rise to these populations remain elusive. Here we present a systematic search for broad-line Active Galactic Nuclei (AGNs) in some of the faintest high-$z$ galaxies surveyed yet by combining ultra-deep JWST/NIRSpec G395M spectroscopy with the strong lensing aid in Abell S1063. By employing the profile of the [OIII]$λ5007$ emission lines as a template for na…

Forbush Decreases during strong Geomagnetic Storms: Time Delays, Rigidity Effects, and ICME-Driven Modulation
O. Ahmed, B. Badruddin, M. Derouich
https://arxiv.org/abs/2508.10165

Forbush Decreases during strong Geomagnetic Storms: Time Delays, Rigidity Effects, and ICME-Driven Modulation
We investigate the relationship between Forbush decreases (FDs) and associated geomagnetic storms, and their links to interplanetary solar wind parameters, using high-resolution minute data. FDs are classified by main-phase decrease steps and analyzed with superposed epoch analysis. Fast, turbulent, high-field sheath structures occur before and during coronal mass ejection (CME)-driven FDs, whereas corotating interaction region events show delayed amplification and more perturbed dynamics. Time…

SIV Guided Resolution of the Lithium-7 BBN Problem
Vesselin G. Gueorguiev
https://arxiv.org/abs/2509.10721 https://arxiv.org/pdf/2509.10721

SIV Guided Resolution of the Lithium-7 BBN Problem
A possible resolution of the $^7$Li problem within the Standard Model Big-Bang Nucleosynthesis is presented. The key idea originates from the application of the Scale-Invariant Vacuum (SIV) paradigm to the BBN. However, here we arrive at the conclusion that Reparametrization Invariant Symmetry Scaling (RISS) is the more appropriate framework for the epoch of the BBN and use the SIV only as a guidance framework. The outcome is $χ^2<0.04$ fit to the observed primordial abundances of $^4$He, D/H,…

A Bolometric Luminosity Correction Recipe for AGN at Any Epoch
Mojegan Azadi, Belinda Wilkes, Joanna Kuraszkiewicz, Steven. P. Willner, Matthew L. N. Ashby
https://arxiv.org/abs/2509.19666

A Bolometric Luminosity Correction Recipe for AGN at Any Epoch
Understanding how active galactic nuclei (AGN) affect their host galaxies requires determining their total radiative power across all wavelengths (i.e., bolometric luminosities). We show how AGN accretion disk spectral energy distribution (SED) templates, parameterized by supermassive black hole (SMBH) mass, Eddington ratio, spin, and inclination, can be used to estimate total radiated luminosities. Bolometric luminosities are calculated by integrating the accretion disk SEDs from 1$μ$m to 10k…

Activity in White Dwarf Debris Disks I: Spitzer Legacy Reveals Variability Incompatible with the Canonical Model
Hiba Tu Noor, Jay Farihi, Scott J. Kenyon, Roman R. Rafikov, Mark C. Wyatt, Kate Y. L. Su, Carl Melis, Andrew Swan, Thomas G. Wilson, Boris T. G\"ansicke, Amy Bonsor, Laura K. Rogers, Seth Redfield, Mukremin Kilic
https://a…

Activity in White Dwarf Debris Disks I: Spitzer Legacy Reveals Variability Incompatible with the Canonical Model
This study presents all available, multi-epoch 3.6 and 4.5 $μ$m photometry from Spitzer Space Telescope observations of white dwarf debris disks, including weekly cadence observations of 16 relatively bright systems, and 5 h staring-mode observations for five of these. Significant variability is detected in 85 per cent of disks and across all timescales probed, from minutes to weeks to years, where the largest flux changes correlate with the longest time baselines, and the infrared excesses pe…

Exploring the Early Universe with Deep Learning
Emmanuel de Salis, Massimo De Santis, Davide Piras, Sambit K. Giri, Michele Bianco, Nicolas Cerardi, Philipp Denzel, Merve Selcuk-Simsek, Kelley M. Hess, M. Carmen Toribio, Franz Kirsten, Hatem Ghorbel
https://arxiv.org/abs/2509.22018

Exploring the Early Universe with Deep Learning
Hydrogen is the most abundant element in our Universe. The first generation of stars and galaxies produced photons that ionized hydrogen gas, driving a cosmological event known as the Epoch of Reionization (EoR). The upcoming Square Kilometre Array Observatory (SKAO) will map the distribution of neutral hydrogen during this era, aiding in the study of the properties of these first-generation objects. Extracting astrophysical information will be challenging, as SKAO will produce a tremendous amo…

The JWST EXCELS Survey: A spectroscopic investigation of the ionizing properties of star-forming galaxies at 1<z<8
R. Begley, R. J. McLure, F. Cullen, A. C. Carnall, T. M. Stanton, D. Scholte, D. J. McLeod, J. S. Dunlop, K. Z. Arellano-C\'ordova, C. Bondestam, C. T. Donnan, M. L. Hamadouch, A. E. Shapley, S. Stevenson
https://arx…

The JWST EXCELS Survey: A spectroscopic investigation of the ionizing properties of star-forming galaxies at 1
Charting the Epoch of Reionization demands robust assessments of what drives the production of ionizing photons in high-redshift star-forming galaxies (SFGs), and requires better predictive capabilities from current observations. Using a sample of $N=159$ SFGs at $1