Tootfinder

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.

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…

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

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…

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…

Using gravitational lensing to probe for bright quintessential galaxies in the Epoch of Reionization
Joshua Roberson, Matthew B. Bayliss, M. D. Gladders, Gourav Khullar, Keren Sharon, Keunho Kim, Dan Coe, Lindsey Bleem, Taweewat Somboonpanyakul
https://arxiv.org/abs/2510.12097

Using gravitational lensing to probe for bright quintessential galaxies in the Epoch of Reionization
Understanding the properties of the first generation of galaxies is an ongoing challenge in observational astrophysics. While advances in deep field observation have led to the identification of large numbers of galaxies within the Epoch of Reionization, there are very few observed galaxies at this range that are sufficiently bright for high signal-to-noise spectroscopy. To this end, we analyse HST and ground-based photometry of five candidate strongly lensed galaxies, all projected behind the …

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…

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

Recovering the Coupled Treatment of Redshift-Space Distortions and the Lightcone Effect after Diffuse Foreground Removal
Jennifer Feron, Emma Chapman
https://arxiv.org/abs/2509.13920

Recovering the Coupled Treatment of Redshift-Space Distortions and the Lightcone Effect after Diffuse Foreground Removal
The 21 cm brightness temperature during the Epoch of Reionisation is widely modelled using semi-numeric simulations, used for their computational speed and flexibility in testing astrophysical and cosmological parameters. However, it is common practice to simulate coeval brightness temperature boxes, and then apply post-processing algorithms that treat the lightcone effect and redshift-space distortions separately, assuming they can be added in sequence. We instead model them together, allowing…

Galaxy Metallicity Gradients in the Reionization Epoch from the FIRE-2 Simulations
Xunda Sun, Xin Wang, Fangzhou Jiang, Houjun Mo, Luis C. Ho, Qianqiao Zhou, Xiangcheng Ma, Hu Zhan, Andrew Wetzel, Russell L. Graf, Philip F. Hopkins, Dusan Keres, Jonathan Stern
https://arxiv.org/abs/2510.08997

Galaxy Metallicity Gradients in the Reionization Epoch from the FIRE-2 Simulations
We employ the high-redshift suite of FIRE-2 cosmological hydrodynamic zoom-in simulations to investigate the evolution of gas-phase metallicity radial gradients in galaxies in the epoch of reionization (EoR). Our sample consists of 22 galaxies spanning the redshift range $z \sim 10-5$. We find that galaxies at $z\sim10$ exhibit a median metallicity gradient of $-0.15\,\mathrm{dex\cdot kpc^{-1}}$ with substantial scatter, which gradually flatten to $-0.1\,\mathrm{dex\cdot kpc^{-1}}$ at $z\sim6$,…

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

#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

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...

It also really makes me wonder if anyone has tried comparing this current tendency for online spaces to close themselves off with the Biedermeier epoch of the 1800s, where folks "retreated into private spaces" at a time that confronted people with political oppression/surveillance and living through generally unstable times.

Accretion-Regulated Type Transitions in Changing-Look AGNs: Evidence from Two-Epoch Spectral Analysis
Yu-Heng Shen, Kai-Xing Lu, Wei-Jian Guo, Sha-Sha Li, Hai-Cheng Feng, Zhang Yue, Wen-Zhe Xi, Jian-Guo Wang, Jin-Ming Bai
https://arxiv.org/abs/2510.08868

Accretion-Regulated Type Transitions in Changing-Look AGNs: Evidence from Two-Epoch Spectral Analysis
The changing-look active galactic nucleus (CL-AGN), an extraordinary subpopulation of supermassive black holes, has attracted growing attention for understanding its nature. We present an analysis of the spectral properties of 203 low-redshift CL-AGNs ($z<0.35$) using two-epoch spectra from SDSS DR16 and DESI DR1 with time baseline ranging from $\sim$1000 to 8000 days, based on spectral fitting and decomposition. The sample consists of 11.3\% Type 1.0, 26.6\% Type 1.2, 43.1\% Type 1.5, and 19\%…

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.

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/

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 $z \sim 6.8$…

Stacking 21-cm Maps around Lyman-$\alpha$ Emitters during Reionization: Prospects for a Cross-correlation Detection with the Hydrogen Epoch of Reionization Array
Kai-Feng Chen, Meredith Neyer, Jacqueline N. Hewitt, Aaron Smith, Mark Vogelsberger
https://arxiv.org/abs/2510.07374

Stacking 21-cm Maps around Lyman-$α$ Emitters during Reionization: Prospects for a Cross-correlation Detection with the Hydrogen Epoch of Reionization Array
Observations of the redshifted 21-cm line during the Epoch of Reionization will open a new window to probe the intergalactic medium during the formation of the first stars, galaxies, and black holes. A particularly promising route to an initial detection is to cross-correlate tomographic 21-cm maps with spectroscopically confirmed Lyman-$α$ emitters (LAEs). High-redshift LAEs preferentially reside in ionized bubbles that are strongly anticorrelated with the surrounding neutral regions traced b…

The true geeks among you will appreciate this:
How to convert a day number (and, transitively) a number of seconds since an calendar start date ("epoch", e.g. 1970-01-01) into a readable date in only 24 CPU cycles.
https://www.benjoffe.com/fast-date-64

Probing evolution of Long GRB properties through their cosmic formation history aided by Machine Learning predicted redshifts
Dhruv S. Bal, Aditya Narendra, Maria Giovanna Dainotti, Nikita S. Khatiya, Aleksander L. Lenart, Dieter H. Hartmann
https://arxiv.org/abs/2510.07306

Probing evolution of Long GRB properties through their cosmic formation history aided by Machine Learning predicted redshifts
Gamma-ray Bursts (GRBs) are valuable probes of cosmic star formation reaching back into the epoch of reionization, and a large dataset with known redshifts ($z$) is an important ingredient for these studies. Usually, $z$ is measured using spectroscopy or photometry, but $\sim80\%$ of GRBs lack such data. Prompt and afterglow correlations can provide estimates in these cases, though they suffer from systematic uncertainties due to assumed cosmologies and due to detector threshold limits. We use …

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

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…

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…

Deep uGMRT observations for enhanced calibration of 21 cm arrays -- I. First image and source catalogue
Khandakar Md Asif Elahi, Samir Choudhuri, Nirupam Roy, Md Rashid, Philip Bull, Dharam Vir Lal
https://arxiv.org/abs/2510.09571

Deep uGMRT observations for enhanced calibration of 21 cm arrays -- I. First image and source catalogue
Radio-interferometric arrays require very precise calibration to detect the Epoch of Reionization 21-cm signal. A remarkably complete and accurate sky model is therefore needed in the patches of the sky used to perform the calibration. Instruments such as HERA, which use a redundant calibration strategy, also require a reference sky model to fix degenerate gain solutions. We have carried out a deep (20 hours) observation using the upgraded GMRT to make a high-fidelity sky model of one of the HE…

RFSoC receiver calibration system for 21-cm global spectrum experiments from space: The CosmoCube case
Jiacong Zhu, Eloy de Lera Acedo, Kaan Artuc, Xuelei Chen
https://arxiv.org/abs/2510.06558

RFSoC receiver calibration system for 21-cm global spectrum experiments from space: The CosmoCube case
The CosmoCube project plans to deploy a global 21-cm spectrometer with 10-100 MHz observation band in a lunar orbit. The farside part of such an orbit, i.e. the part of orbit behind the Moon, offers an ideal site for accurately measuring the 21-cm signal from the Dark Ages, Cosmic Dawn and Epoch of Reionization, as the effects of the Earth's ionosphere, artificial radio frequency interference (RFI), and complex terrain and soil are all avoided. Given the limitations of a satellite platform, we …

REBELS-IFU: Linking damped Lyman-$\alpha$ absorption to [CII] emission and dust content in the EoR
Lucie E. Rowland, Kasper E. Heintz, Hiddo Algera, Mauro Stefanon, Jacqueline Hodge, Rychard Bouwens, Manuel Aravena, Elisabete da Cunha, Pratika Dayal, Andrea Ferrara, Rebecca Fisher, Valentino Gonz\'alez, Hanae Inami, Olena Komarova, Ilse de Looze, Themiya Nanayakkara, Katherine Ormerod, Andrea Pallottini, Clara L. Pollock, Renske Smit, Paul van der Werf, Joris Witstok

REBELS-IFU: Linking damped Lyman-$α$ absorption to [CII] emission and dust content in the EoR
Neutral gas in galaxies during the Epoch of Reionisation regulates star formation, dust growth, and the escape of ionising photons, making it a key ingredient in understanding both galaxy assembly and reionisation. Yet, direct constraints on the HI content of galaxies at z>6 have been scarce. With JWST, Ly$α$ damping wings in galaxy spectra can now provide a direct probe of this neutral component. We analyse JWST/NIRSpec prism spectra of 12 UV-luminous galaxies from the REBELS-IFU program at z…

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 …

Resolving stellar populations, star formation, and ISM conditions with JWST in a large spiral galaxy at z $\sim$ 2
Eleonora Parlanti, Giulia Tozzi Natascha M. F\"orster Schreiber, Claudia Pulsoni, Letizia Scaloni, Stavros Pastras, Pascal Oesch, Capucine Barfety, Francesco Belfiore, Jianhang Chen, Giovanni Cresci, Ric Davies, Frank Eisenhauer, Juan M. Espejo Salcedo, Reinhard Genzel, Rodrigo Herrera-Camus, Jean-Baptiste Jolly. Lilian L. Lee, Minju M. Lee, Daizhong Liu, Dieter Lutz,…

Resolving stellar populations, star formation, and ISM conditions with JWST in a large spiral galaxy at z $\sim$ 2
Cosmic noon represents the prime epoch of galaxy assembly, and a sweet spot for observations with the James Webb Telescope (JWST) and ground-based near-IR integral-field unit (IFU) spectrographs. This work analyses JWST NIRSpec Micro Shutter Array (MSA), NIRCam Wide Field Slitless Spectroscopy (WFSS) of K20-ID7, a large spiral, star-forming (SF) galaxy at z=2.2, with evidence for radial gas inflows. By exploiting the synergy with ground-based IFU ERIS observations, we conduct a comprehensive an…

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…

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…

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…

JWST Catches a Strongly Gravitationally Lensed AGN In Transition from Type II to Type I
Michael K Florian, Michael D Gladders, Gourav Khullar, Keren Sharon, Aidan P Cloonan, Eirk Solhaug, Brian Welch, Matthew Bayliss, Hakon Dahle, Taylor A Hutchison, Jane R Rigby
https://arxiv.org/abs/2510.10376

JWST Catches a Strongly Gravitationally Lensed AGN In Transition from Type II to Type I
JWST has enabled the discovery of a statistical sample of obscured (type II) active galactic nuclei (AGN) at cosmic noon. Studies comparing those type II AGN with type I AGN at that epoch have reinforced the long-standing idea of an evolutionary link between those classes of objects. Mergers, the idea goes, disturb the morphologies and angular momentum of galaxies. The disruption of angular momentum allows material to be funneled toward galactic cores, sparking AGN activity and potentially also…

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…

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

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…

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

Metals versus Non-metals: Chemical Evolution of Hydrogen and Helium Isotopes in the Milky Way
James W. Johnson, Miqaela K. Weller, Ryan J. Cooke
https://arxiv.org/abs/2510.08689

Metals versus Non-metals: Chemical Evolution of Hydrogen and Helium Isotopes in the Milky Way
Star formation drives changes in the compositions of galaxies, fusing H and He into heavier nuclei. This paper investigates the differences in abundance evolution between metal and non-metal isotopes using recent models of Galactic chemical evolution appropriate for the thin disk epoch. A strong degeneracy arises between metal yields from stellar populations and the mean Galactocentric radial velocity of the interstellar medium (ISM). Similar metallicities arise when increases (decreases) in me…

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…

Primordial Black Holes and their Mass Spectra: The Effects of Mergers and Accretion within Stasis Cosmologies
Keith R. Dienes, Lucien Heurtier, Fei Huang, Tim M. P. Tait, Brooks Thomas
https://arxiv.org/abs/2510.06551

Primordial Black Holes and their Mass Spectra: The Effects of Mergers and Accretion within Stasis Cosmologies
A variety of processes in the very early universe can give rise to a population of primordial black holes (PBHs) with an extended mass spectrum. For certain mass spectra of this sort, it has been shown that the evaporation of these PBHs into radiation can drive the universe toward an epoch of cosmological stasis which can persist for a significant number of $e$-folds of cosmological expansion. However, in general, the initial mass spectrum which characterizes a population of PBHs at the time of…

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…

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…

Lepton Collider as a Window to Reheating via Freezing Out Dark Matter Detection
Subhaditya Bhattacharya, Anupam Ghosh, Niloy Mondal, Abhik Sarkar
https://arxiv.org/abs/2509.14340

Lepton Collider as a Window to Reheating via Freezing Out Dark Matter Detection
We investigate a particle dark matter (DM) scenario where the DM interaction with the Standard Model are mediated by a leptophilic effective operator. Unlike conventional WIMP scenarios where thermal freeze-out occurs in a radiation-dominated Universe, we consider DM freeze-out during a prolonged reheating epoch driven by inflaton decay. The resulting departure from standard cosmology alters the thermal evolution of the dark matter abundance, making it sensitive to the reheating temperature and…

🇺🇦 #NowPlaying on KEXP's #VarietyMix
Girls of the Internet & The Gospel of Thomas feat. The Voices of Epoch:
🎵 Forever
#GirlsoftheInternet #TheGospelofThomas #TheVoicesofEpoch
#newRelease 🆕 album

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 Sample of HeII {\lambda}4686 "Changing-Look" Quasars
Wentao Lu, Jun-Xian Wang
https://arxiv.org/abs/2510.06753 https://arxiv.org/pdf/2510.06753…

A Sample of HeII λ4686 "Changing-Look" Quasars
We present the first systematic search for "changing-look" ("CL") behavior in the broad He ii λ4686 emission line in quasars, utilizing repeated spectroscopy from the Sloan Digital Sky Survey (SDSS). The He ii line, originating from high-ionization gas and powered by extreme ultraviolet photons, serves as a sensitive tracer of changes in the ionizing continuum. After applying strict spectral selection criteria and visual inspection to a parent sample of over 9,000 quasars with multi-epoch spec…

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…

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…

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…

Towards a Robust Machine-Learning Pipeline for 21-cm Cosmology Data Analysis I: A Roadmap for Development and Demonstration of Robustness Against PSF Modeling Errors
Madhurima Choudhury, Jonathan C. Pober
https://arxiv.org/abs/2509.16280

Towards a Robust Machine-Learning Pipeline for 21-cm Cosmology Data Analysis I: A Roadmap for Development and Demonstration of Robustness Against PSF Modeling Errors
The 21-cm signal from the Epoch of Reionization (EoR) is a powerful probe of the evolution of the Universe. However, accurate measurements of the EoR signal from radio interferometric observations are sensitive to efficient foreground removal, mitigating radio-frequency interference and accounting for instrumental systematics. This work represents the first in a series of papers, where we will be introducing a novel ML based pipeline, step-by-step, to directly infer reionization parameters from…

Probing the Topology of the Early Universe using CMB Temperature and Polarization Anisotropies
Miguel-Angel Sanchis-Lozano
https://arxiv.org/abs/2509.22106 https://

Probing the Topology of the Early Universe using CMB Temperature and Polarization Anisotropies
The temperature and polarization of the cosmic microwave background (CMB), as measured today, may offer key insights into the topology of the early universe prior to inflation, for example, by discriminating between flat and warped geometries. In this paper, we focus on a Kaluza-Klein model with an extra spatial dimension that compactifies at the Grand Unified Theory (GUT) epoch, subject to mixed Neumann/Dirichlet boundary conditions at fixed points. As a consequence, a set of infrared cutoffs …

Calibration-independent consistency test of DESI DR2 BAO and SNIa
Bikash R. Dinda, Roy Maartens, Chris Clarkson
https://arxiv.org/abs/2509.19899 https://ar…

Calibration-independent consistency test of DESI DR2 BAO and SNIa
We investigate the consistency between DESI DR2 BAO and three SNIa datasets, Pantheon+, Union3, and DES-Y5. Our consistency test is {calibration}-independent since it is independent of cosmological nuisance parameters such as the absolute peak magnitude $M_B$ and the comoving sound horizon at the baryon drag epoch $r_d$. {This could reduce some systematics in the observed data, if present}. Importantly, the test is also model-agnostic, independent of any model of dark energy or modified gravity…

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…

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