Tootfinder

Rare-Earth Engineering of NaAlO3 Perovskites Unlocks Unified Optoelectronic, Thermoelectric, and Spintronic Functionalities
Muhammad Imran, Sikander Azam, Qaiser Rafiq, Amin Ur Rahman
https://arxiv.org/abs/2510.08130

Rare-Earth Engineering of NaAlO3 Perovskites Unlocks Unified Optoelectronic, Thermoelectric, and Spintronic Functionalities
Perovskite oxides are promising for energy and quantum technologies, but wide-gap hosts such as NaAlO3 suffer from deep-UV absorption and limited carrier transport. Using first-principles GGA+U+SOC calculations, we investigate Eu3+-, Gd3+-, and Tb3+-doped NaAlO3 and evaluate their electronic, optical, elastic, and thermoelectric properties. Rare-earth substitution is thermodynamically favorable (formation energies 1.2-1.6 eV) and induces strong f-p hybridization, reducing the pristine band gap …

Nonsingular Schwarzschild-de Sitter black holes in finite conformal quantum gravity
Diego A. Mart\'inez-Valera
https://arxiv.org/abs/2510.05466 https://

Nonsingular Schwarzschild-de Sitter black holes in finite conformal quantum gravity
In this work, we prove that the classical Schwarzschild-de Sitter spacetime is an exact solution of a class of weakly non-local, UV finite conformal quantum gravity theories, without the necessity of including a cosmological constant term in the action, thus associating the effective cosmological constant $Λ$ appearing in the metric with the coupling constants of the quantum gravity theory. Furthermore, exploiting the inherent conformal symmetry of the theory, we take advantage of the natural …

One-loop Euler-Heisenberg action in Lorentz-violating QED revisited
R. Ara\'ujo, T. Mariz, J. R. Nascimento, A. Yu. Petrov
https://arxiv.org/abs/2510.04252 https://

One-loop Euler-Heisenberg action in Lorentz-violating QED revisited
We discuss applications of the proper-time method in a Lorentz-violating extension of QED characterized by the modification of the mass sector through the addition of the term proportional to the antisymmetric tensor $H_{μν}$. Unlike other LV extensions of QED, in our case the one-loop Euler-Heisenberg-like action turns out to include only odd degrees of the stress tensor $F_{μν}$. Our result is shown to be UV finite, and it is confirmed using the Feynman diagrams framework.

SeamCrafte: Enhancing Mesh Seam Generation for Artist UV Unwrapping via Reinforcement Learning
Duoteng Xu, Yuguang Chen, Jing Li, Xinhai Liu, Xueqi Ma, Zhuo Chen, Dongyu Zhang, Chunchao Guo
https://arxiv.org/abs/2509.20725

SeamCrafte: Enhancing Mesh Seam Generation for Artist UV Unwrapping via Reinforcement Learning
Mesh seams play a pivotal role in partitioning 3D surfaces for UV parametrization and texture mapping. Poorly placed seams often result in severe UV distortion or excessive fragmentation, thereby hindering texture synthesis and disrupting artist workflows. Existing methods frequently trade one failure mode for another-producing either high distortion or many scattered islands. To address this, we introduce SeamCrafter, an autoregressive GPT-style seam generator conditioned on point cloud inputs…

1/ My daughter had a friend over for a sleepover on Saturday night. This was huge as my daughter has been refusing to sleep at my house for over a year now. Despite me telling the girls that they’re only to do makeup at the dining table, they did it in the living room, staining some of the furniture. What’s worse is that my daughter snuck a UV lamp in to my house and did both their nails with that which I doubt her friend’s mum will be happy about. I’m fuming as I explicitly forbade tha…

An excess of luminous white dwarfs in the peculiar Galactic globular cluster NGC 2808
Laksh Gupta, Samyaday Choudhury, Annalisa Calamida, Christian I. Johnson, Domenico Nardiello
https://arxiv.org/abs/2509.26190

An excess of luminous white dwarfs in the peculiar Galactic globular cluster NGC 2808
We study the white dwarf (WD) cooling sequence of the Galactic Globular Cluster (GGC) NGC 2808 by using deep near-UV data from the Hubble Space Telescope and theoretical models, to investigate if this cluster hosts an excess of WDs. Excess in WDs is a rare phenomenon that has been found to exist only in a few GGCs. We compared star counts from different evolutionary phases on the near-UV color-magnitude diagram to evolutionary times predicted by BaSTI models. The investigation was carried out o…

Instability of the Sherman-Morrison formula and stabilization by iterative refinement
Behnam Hashemi, Yuji Nakatsukasa
https://arxiv.org/abs/2510.01696 https://

Instability of the Sherman-Morrison formula and stabilization by iterative refinement
Owing to its simplicity and efficiency, the Sherman-Morrison (SM) formula has seen widespread use across various scientific and engineering applications for solving rank-one perturbed linear systems of the form $(A+uv^T)x = b$. Although the formula dates back at least to 1944, its numerical stability properties have remained an open question and continue to be a topic of current research. We analyze the backward stability of the SM, demonstrate its instability in a scenario increasingly common …

The Prevalence of Bursty Star Formation in Low-Mass Galaxies at z=1-7 from H{\alpha}-to-UV Diagnostics
Marissa N. Perry (The University of Texas at Austin, Department of Astronomy), Anthony J. Taylor (The University of Texas at Austin, Department of Astronomy), Oscar A. Chavez Ortiz (The University of Texas at Austin, Department of Astronomy), Steven L. Finkelstein (The University of Texas at Austin, Department of Astronomy), Gene C. K. Leung (MIT Kavli Institute for Astrophysics and S…

The Prevalence of Bursty Star Formation in Low-Mass Galaxies at z=1-7 from Hα-to-UV Diagnostics
We present an analysis of bursty star-formation histories (SFHs) of 346 star-forming galaxies at $1\lesssim z<7$, selected from JWST/NIRSpec G395M and PRISM spectroscopy provided by the CEERS and RUBIES surveys. We analyze the correlation of star-formation rate vs. stellar mass (the star-forming main sequence, SFMS) for our sample and find no significant difference between the intrinsic scatter in the H$α$-based SFMS and the UV-continuum-based SFMS. However, the diagnostic power of the SFMS is…

Discovery of Changing-Look behavior in AGN NGC 3822: A long-term multiwavelength study
Narendranath Layek, Prantik Nandi, Sachindra Naik, Birendra Chhotaray, Arghajit Jana, Priyadarshee P. Dash, Neeraj Kumari, C. S. Stalin, Srikanth Bandari, S. Muneer
https://arxiv.org/abs/2510.05599

Discovery of Changing-Look behavior in AGN NGC 3822: A long-term multiwavelength study
We present a comprehensive long-term multi-wavelength study of the active galactic nucleus (AGN) NGC 3822, based on 17 years (2008 to 2025) of X-ray, ultraviolet (UV), and optical observations.The dataset includes observations from Swift, XMM-Newton, and NuSTAR, the Very Large Telescope, and the Himalayan Chandra Telescope. Our multiwavelength light curve analysis reveals flux variations across X-ray to optical/UV bands, with an increased variability amplitude at shorter wavelengths. X-ray spec…

Not Just a Dot - the complex UV morphology and underlying properties of Little Red Dots: #LittleRedDots frequently reveal clumpy morphologies, and some of these also bear the hallmarks of active black holes: https://www.astronomie.nl/nieuws/en/little-red-dots-frequently-reveal-clumpy-morphologies-and-some-of-these-also-bear-the-hallmarks-of-active-black-holes-4687

Extreme Geomagnetic Storm on Early Earth Induced by Corotating Interaction Regions from the Young Sun
Dibyendu Sur, Vladimir S. Airapetian
https://arxiv.org/abs/2509.21627 https…

Extreme Geomagnetic Storm on Early Earth Induced by Corotating Interaction Regions from the Young Sun
Recent multiwavelength observations of young solar analogs suggest that the young Sun in the first 600 Myr was a magnetically active star that produced an X-ray and Extreme-UV (EUV) bright corona, fast, massive stellar wind, and energetic eruptive events. These outputs affected magnetospheric environments of early Earth and young rocky exoplanets. The interaction of the fast solar wind with the slow wind produced strong shocks from Corotating Interaction Regions (CIRs) that provided high dynami…

Ultraviolet optical conductivity, exciton fine-structure and dispersion of freestanding monolayer h-BN
Jinhua Hong, Alberto Guandalini, Weibin Wu, Haiming Sun, Fuwei Wu, Shulin Chen, Chao Ma, Kazu Suenaga, Thomas Pichler, Francesco Mauri
https://arxiv.org/abs/2510.08397

Ultraviolet optical conductivity, exciton fine-structure and dispersion of freestanding monolayer h-BN
Excitons govern the light-matter interaction in 2D gapped materials with intrinsically large binding energies. In spite of plentiful optical measurements in the visible for semiconducting transition-metal dichalcogenides, we still lack optical-absorption studies of the exciton structure of insulating 2D materials that requires UV light. Moreover, measurements of the momentum dispersion of excitons in the vicinity of optical limit are rare owing to low resolutions but hold the key to reveal quas…

The distance spectrum of the bipartite double cover of strongly regular graphs
S. Morteza Mirafzal
https://arxiv.org/abs/2510.02400 https://arxiv.org/pdf/2…

The distance spectrum of the bipartite double cover of strongly regular graphs
A strongly regular graph with parameters $(n,d,a,c)$ is a $d$-regular graph of order $n$, in which every pair of adjacent vertices has exactly $a$ common neighbor(s) and every pair of nonadjacent vertices has exactly $c$ common neighbor(s). Let $n$ be the number of vertices of the graph $G=(V,E)$. The distance matrix $D=D(G)$ of $G$ is an $n \times n $ matrix with the rows and columns indexed by $V$ such that $D_{uv} = d_{G}(u, v)=d(u,v)$, where $d_{G}(u, v)$ is the distance between the verti…

Unsymmetrical synthesis of benzimidazole-fused naphthalene imides with panchromatic absorption and redox activity
Guan-Ru Lin, Huai-Chih Chang, Yi-Chen Wu, Chen-Kai Hsieh, Chih-Jou Chien, Guan-Lin Lu, Makeshmuralikrishna Kulasekaran, Milanmathew Sssuraj, Tzu-Ling Ho, Jatin Rawat, Hsien-Hsin Chou
https://arxiv.org/abs/2509.21364

Unsymmetrical synthesis of benzimidazole-fused naphthalene imides with panchromatic absorption and redox activity
We report a concise synthesis of unsymmetrical benzimidazole-fused naphthalene imide (BfNI) and anhydride (BfNA) derivatives featuring broad UV-Vis-NIR absorption, stable redox activity, and enhanced solubility. Incorporation of triarylamine donors induces strong intramolecular charge transfer and narrows the optical bandgap. This modular design bypasses multistep protection-deprotection and complex pi-assembly, offering a versatile platform for tunable optoelectronic materials.

Flavour, Accidentally
Hannah Banks, Graeme Crawford, Matthew McCullough, Dave Sutherland
https://arxiv.org/abs/2510.03403 https://arxiv.org/pdf/2510.03403

Flavour, Accidentally
We propose a new class of flavour models in which the spurion which breaks Standard Model flavour symmetries transforms in a non-minimal representation. Hierarchies in fermion masses, which arise from multiple insertions of this spurion, may be generated in a technically natural, accidental manner, from a handful of untuned $\mathcal{O}(1)$ elements in the UV. This relies explicitly on the non-Abelian nature of the symmetry, distinguishing it from standard Froggatt-Nielsen-like scenarios. The p…

Ultraviolet radiation and neutrinos: two messengers from CCSNe in the CSM scenario
Silvia Gagliardini, Simone Dall'Osso, Dafne Guetta, Angela Zegarelli, Silvia Celli, Antonio Capone, Irene Di Palma
https://arxiv.org/abs/2510.11916

Ultraviolet radiation and neutrinos: two messengers from CCSNe in the CSM scenario
Massive stars (>8 $M_{\odot}$) often undergo intense mass loss through winds or eruptive events in the final stages of their evolution, leading to the formation of a dense circumstellar medium (CSM). This material, expelled months to years before core collapse, shapes the pre-explosion environment and influences the early supernova (SN) emission. In particular, the interaction of the SN ejecta with the dense CSM can power an extended emission into the UV/optical bands, as seen in a growing frac…

The first GLIMPSE of the faint galaxy population at Cosmic Dawn with JWST: The evolution of the ultraviolet luminosity function across z~9-15
Iryna Chemerynska, Hakim Atek, Lukas J. Furtak, John Chisholm, Ryan Endsley, Vasily Kokorev, Joki Rosdahl, Jeremy Blaizot, Angela Adamo, Rychard Bouwens, Seiji Fujimoto, Damien Korber, Charlotte Mason, Kristen B. W. McQuinn, Julian B. Mu\~noz, Priyamvada Natarajan, Erica Nelson, Pascal A. Oesch, Richard Pan, Johan Richard, Alberto Saldana-Lopez, …

The first GLIMPSE of the faint galaxy population at Cosmic Dawn with JWST: The evolution of the ultraviolet luminosity function across z~9-15
Using ultra-deep JWST NIRCam imaging from the GLIMPSE Survey, enhanced by gravitational lensing of the AbellS1063 cluster, we investigate the faintest galaxies ever observed in the redshift range z~9 to z~15. We identify 105 galaxy candidates within this range, spanning absolute ultraviolet (UV) magnitudes from M_UV~-18 to M_UV~-13 mag, about three magnitudes fainter, on average, than prior JWST studies. We place strong constraints on the ultra-faint end of the UV luminosity function (UVLF), fi…

UV-irradiated outflows from low-mass #protostars in Ophiuchus with JWST/MIRI: https://www.aanda.org/articles/aa/abs/2025/11/aa54977-25/aa54977-25.html -> On the trail of ultraviolet radiation in Ophiuchus / Puzzling ultraviolet radiation in the birthplaces of stars: https://portal.umk.pl/en/article/on-the-trail-of-ultraviolet-radiation-in-ophiuchus / https://www.mpifr-bonn.mpg.de/pressreleases/2025/7

Crosslisted article(s) found for physics.space-ph. https://arxiv.org/list/physics.space-ph/new
[1/1]:
- A Passive UV-Based System for Discharging the Test Masses of Ground Based Gravitational Wave Dete...
Saps Buchman, Suwen Wang, Shallendar Saraf

Next Generation Ta-STJ Sensor Arrays for BSM Physics Searches
Joseph P. T. Templet, Spencer Fretwell, Andrew Marino, Robin Cantor, Ad Hall, Connor Bray, Caitlyn Stone-Whitehead, Inwook Kim, Francisco Ponce, Wouter Van De Pontseele, Kyle G. Leach, Stephan Friedrich
https://arxiv.org/abs/2510.03556

Next Generation Ta-STJ Sensor Arrays for BSM Physics Searches
The Beryllium Electron capture in Superconducting Tunnel junctions (BeEST) experiment uses superconducting tunnel junction (STJ) sensors to search for physics beyond the standard model (BSM) with recoil spectroscopy of the $\mathbf{^7}$Be EC decay into $\mathbf{^7}$Li. A pulsed UV laser is used to calibrate the STJs throughout the experiment with $\sim$20 meV precision. Phase-III of the BeEST experiment revealed a systematic calibration discrepancy between STJs. We found these artifacts to be c…

Holographic codes and bulk RG flows
Xi Dong, Donald Marolf, Pratik Rath
https://arxiv.org/abs/2509.21438 https://arxiv.org/pdf/2509.21438

Holographic codes and bulk RG flows
We consider the coarse-graining of holographic quantum error correcting codes under a generalized notion of bulk renormalization-group flow. In particular, we study the renormalization under this flow of the $A/4G$ term in the Faulkner-Lewkowycz-Maldacena formula and in its Rényi generalization. This provides a general quantum code perspective on the arguments of Susskind and Uglum. Specifically, given a 'UV' code with two-sided recovery and appropriately flat entanglement spectrum together wi…

Matching JWST UV Luminosity Functions with Refined $\Lambda$CDM Halo Models
Saeed Fakhry, Maryam Shiravand, Antonino Del Popolo
https://arxiv.org/abs/2510.04709 https://

Matching JWST UV Luminosity Functions with Refined $Λ$CDM Halo Models
The James Webb Space Telescope (JWST) has unveiled a population of unexpectedly massive and luminous galaxies at redshifts $z \gtrsim 7$, posing a significant challenge to the standard $Λ$CDM cosmological paradigm. In this work, we address the tension between early JWST observations of luminous high-redshift galaxies and predictions of the standard $Λ$CDM model by revisiting the physics of dark matter halo formation. Employing refined halo mass functions derived by Del Popolo \textit{et al.} …

An infection-responsive collagen-based wet-spun textile fibre for wound monitoring
Jonathon Gorman, Charles Brooker, Xinyu Li, Giuseppe Tronci
https://arxiv.org/abs/2510.00015 h…

An infection-responsive collagen-based wet-spun textile fibre for wound monitoring
Wound infections are a significant clinical and socioeconomic challenge, contributing to delayed healing and increased wound chronicity. To enable early infection detection and inform therapeutic decisions, this study investigated the design of pH-responsive collagen fibres using a scalable wet spinning process, evaluating product suitability for textile dressings and resorbable sutures. Type I collagen was chemically functionalised with 4-vinylbenzyl chloride, enabling UV-induced crosslinking …

Untangling the Complex Nature of AGN Variability with Fairall 9
Scott Hagen (Durham-CEA), Chris Done (Durham-CEA), Edward M. Cackett (Wayne State), Ethan R. Partington (IA-FORTH), Rick Edelson (Eureka Scientific), Collin Lewin (MIT), Erin Kara (MIT), Jonathan Gelbord (Spectral Sciences Inc)
https://arxiv.org/abs/2509.25324

Untangling the Complex Nature of AGN Variability with Fairall 9
The accretion flow in AGN is not well understood, motivating intensive monitoring campaigns of multiwavelength variability to probe its structure. One of the best of these is the 3 year optical/UV/X-ray approximately daily monitoring campaign on Fairall\,9, a fairly typical moderate accretion rate AGN. The UV lightcurve shows a clear increase over $\sim 50$ days between years 1 and 2, strongly coherent with the X-ray lightcurve rise. This changes the average spectral energy distribution such th…

Cloudy with a chance of starshine: Possible photometric signatures of nebular-dominated emission in $1.5 < z < 8.5$ JADES galaxies
James A. A. Trussler, Alex J. Cameron, Daniel J. Eisenstein, Harley Katz, Nathan J. Adams, Duncan Austin, Andrew J. Bunker, Stefano Carniani, Christopher J. Conselice, Mirko Curti, Emma Curtis-Lake, Kevin Hainline, Thomas Harvey, Benjamin D. Johnson, Qiong Li, Tobias J. Looser, Pierluigi Rinaldi, Brant Robertson, Fengwu Sun, Sandro Tacchella, Christin…

Cloudy with a chance of starshine: Possible photometric signatures of nebular-dominated emission in $1.5 < z < 8.5$ JADES galaxies
The discovery of high-redshift galaxies exhibiting a steep spectral UV downturn potentially indicative of two-photon continuum emission marks a turning point in our search for signatures of top-heavy star formation in the early Universe. We develop a photometric search method for identifying further nebular-dominated galaxy candidates, whose nebular continuum dominates over the starlight, due to the high ionising photon production efficiencies $ξ_\mathrm{ion}$ associated with massive star form…

RE: #Mauve is but one of 140 (!) small satellites on that Falcon 9, collectively known as Transporter 15. What's interesting about the satellite is its commercial approach - you *buy* astronomical UV data: https://bssl.space/mauve/ and https://space.blog.gov.uk/2025/11/06/blue-skies-space-to-launch-mauve-satellite-demonstrating-a-new-model-for-delivering-space-science-data/ and https://www.science.org/content/article/startup-pioneers-subscription-service-space-based-astronomy

Probing Scalar-Mediated Sterile Neutrinos with Gravitational Wave and Colliders Signals
Qi Bi, Jinhui Guo, Jian Liao, Jia Liu, Xiao-Ping Wang
https://arxiv.org/abs/2509.23925 ht…

Probing Scalar-Mediated Sterile Neutrinos with Gravitational Wave and Colliders Signals
We propose a UV-complete extension of the Standard Model in which a gauge-singlet scalar $S$ acquires a vacuum expectation value, generates a Majorana mass for a sterile neutrino $N$, and mixes with the Higgs field. This framework addresses neutrino masses via a seesaw mechanism and, for sufficiently large scalar mixing, can also drive a strong first-order electroweak phase transition, producing gravitational-wave (GW) signals potentially detectable by GW observatories. The Higgs-$S$ mixing als…

Massless S-matrix Bootstraps and RG Flows
Changrim Ahn
https://arxiv.org/abs/2509.20740 https://arxiv.org/pdf/2509.20740

Massless S-matrix Bootstraps and RG Flows
We find complete solutions of S-matrix bootstrap equations for the scatterings of massless particles in (1+1) dimensions with A_n symmetries. We show that only three types (minimal, diagonal, and saturated cases) of these S-matrices can generate RG flows that lead to UV-complete theories, and other RG flows predicted in [11] are inconsistent with the bootstrap equations. Using these S-matrices, we derived the TBA equations and corresponding Y-systems that generate the RG flows between the IR an…

Orbital-Engineered Spin Asymmetry and Multifunctionality in Eu-Activated CaAlSiN$_3$: A First-Principles Roadmap to Optical-Thermoelectric Fusion
Muhammad Tayyab, Faiq Umar, Sikander Azam, Qaiser Rafiq, Rajwali Khan, Muhammad Tahir Khan, Vineet Tirth, Ali Algahtani
https://arxiv.org/abs/2510.00863 …

Orbital-Engineered Spin Asymmetry and Multifunctionality in Eu-Activated CaAlSiN$_3$: A First-Principles Roadmap to Optical-Thermoelectric Fusion
Rare-earth-doped nitride phosphors are promising materials for solid-state lighting and photonic applications due to their thermal stability, sharp emission lines, and strong UV-blue absorption. In this work, we present a first-principles density functional theory (DFT) study, using the GGA+U approach, of pristine and Eu3+-doped CaAlSiN3 at doping levels of 8.5% and 17%. Electronic structure calculations show that Eu incorporation introduces localized 4f states within the band gap, leading to b…

Who would have thought that creating a programming language for rapidly developing, deploying and abandoning lots of packages would have lead to this…
"Forking confusing: Vulnerable Rust crate exposes #uv #Python packager"
#RustLang #security

Multiwavelength continuum, emission line and BAL variability with prominent PV absorption in the X-ray-weakest quasar PG0043 039
Wolfram Kollatschny, Norbert Schartel, Malte A. Probst, Martin W. Ochmann, Lucia Ballo, Maria Santos-Lleo
https://arxiv.org/abs/2510.04733

Multiwavelength continuum, emission line and BAL variability with prominent PV absorption in the X-ray-weakest quasar PG0043+039
PG0043+039 has been identified as an extremely X-ray-weak quasar and as a peculiar broad-absorption-line quasar based on UV HST spectra. We took simultaneous deep X-ray observations of PG0043+039 with XMM-Newton and NuSTAR, UV spectra with the HST, and optical spectra with the HET telescope in 2022. PG0043+039 was an extreme low-X-ray-luminosity quasar in 2022. This AGN showed an extreme steep alpha_oX value of -2.47. The X-ray luminosity was a factor of 3.4 higher in the meantime in 2013. The …

PENELLOPE VIII: Revisiting empirical relations to measure accretion luminosity
E. Fiorellino, J. M. Alcal\'a, C. F. Manara, C. Pittman, P. \'Abrah\'am, L. Venuti, S. Cabrit, R. Claes, M. Fang, \'A. Kosp\'al, G. Lodato, K. Mauco, {\L}. Tychoniec
https://arxiv.org/abs/2509.21078

PENELLOPE VIII: Revisiting empirical relations to measure accretion luminosity
The accretion luminosity (Lacc) in young, low-mass stars is crucial for understanding stellar formation, but direct measurements are often hindered by limited spectral coverage and challenges in UV-excess modeling. Empirical relations linking Lacc to various accretion tracers are widely used to overcome these limitations. This work revisits these empirical relations using the PENELLOPE dataset, evaluating their applicability across different star-forming regions and to accreting young objects o…

Hidden Figures of Globular Clusters: Integrated Stellar Populations Impacted by Hot Subdwarfs
Thayse A. Pacheco, Paula R. T. Coelho, Lucimara P. Martins, Ricardo P. Schiavon, Erik V. R. de Lima, Marcos P. Diaz, Domenico Nardiello, Ronaldo S. Levenhagen, Rogerio Riffel, Charles J. Bonatto, Ana L. Chies-Santos
https://arxiv.org/abs/2510.1232…

Hidden Figures of Globular Clusters: Integrated Stellar Populations Impacted by Hot Subdwarfs
Globular clusters (GCs) are fundamental for understanding the integrated light of old stellar populations and galaxy assembly processes. However, the role of hot, evolved stars, such as horizontal branch (HB), extreme HB, and blue stragglers, remains poorly constrained. These stars are often underrepresented or entirely excluded from stellar population models, despite their dominant contribution to the ultraviolet (UV) flux. Their presence can bias age estimates by mimicking the spectral signat…

Unsupervised Representation Learning for 3D Mesh Parameterization with Semantic and Visibility Objectives
AmirHossein Zamani, Bruno Roy, Arianna Rampini
https://arxiv.org/abs/2509.25094

Unsupervised Representation Learning for 3D Mesh Parameterization with Semantic and Visibility Objectives
Recent 3D generative models produce high-quality textures for 3D mesh objects. However, they commonly rely on the heavy assumption that input 3D meshes are accompanied by manual mesh parameterization (UV mapping), a manual task that requires both technical precision and artistic judgment. Industry surveys show that this process often accounts for a significant share of asset creation, creating a major bottleneck for 3D content creators. Moreover, existing automatic methods often ignore two perc…

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…

Investigating the need for a robust ultraviolet filter set aboard the Habitable Worlds Observatory
Kyle Cook, Benne Holwerda, Clayton Robertson
https://arxiv.org/abs/2510.02054 …

Investigating the need for a robust ultraviolet filter set aboard the Habitable Worlds Observatory
High resolution, ultraviolet imaging is often unavailable across the sky, even in heavily studied fields such as the Chandra Deep Field - South. The Habitable Worlds Observatory is one of two upcoming missions with the possibility of significant UV capabilities, and the only one early enough in development to consider suggestions to its design. In this paper, we conduct an initial study of how current common UV filter sets affect the results of spectral energy distribution fitting for the estim…

The Accretion Disk Size Problem in AGN Disk Reverberation Mapping is an Obscuration Effect: A Uniform AGN Sample Study with Swift
Collin Lewin, Erin Kara, Christos Panagiotou, Edward M. Cackett, Jonathan Gelbord, Juan V. Hern\'andez Santisteban, Keith Horne, Gerard A. Kriss
https://arxiv.org/abs/2509.25315

The Accretion Disk Size Problem in AGN Disk Reverberation Mapping is an Obscuration Effect: A Uniform AGN Sample Study with Swift
In the past decade, Swift has performed several AGN high-cadence reverberation mapping campaigns, and generally found that the UV/optical interband lags are $\sim$3 times longer than predicted for a standard thin disk, thus coined "the accretion disk size problem". Here we present a systematic sample of Swift-monitored AGN. In this analysis, we confirm the accretion disk size problem, but find that the lag excess occurs only in the subset of obscured AGN, which show a significantly elevated mea…

Questing a Coherent Definition of Weak-line Quasars and its Physical Implications
Xiaoqiang Cheng, Jianfeng Wu, Qiaoya Wu
https://arxiv.org/abs/2510.08135 https://

Questing a Coherent Definition of Weak-line Quasars and its Physical Implications
Weak-line quasars (WLQs) are a subset of type 1 quasars with remarkably weak high-ionization broad emission lines but normal optical/UV continua. Using 371,091 quasars from SDSS DR16, we define WLQs by analyzing outliers in three relations: the L1350-CIV blueshift, the Baldwin effect, and the logL2500-alpha_ox. We find two CIV EW thresholds: $8.9\pm0.2$Å and $19.3\pm0.3$Å. WLQs (EW(CIV)<$8.9\pm0.2$Å) have enhanced CIV blueshifts, deviate from the Baldwin effect, and include many X-ray weak o…

LATIS: Galaxy-Environment Relations at Cosmic Noon and the Role of Sample Selection
Nima Chartab, Andrew B. Newman, Gwen C. Rudie, Guillermo Blanc, Daniel D. Kelson, Mahdi Qezlou, Simeon Bird, Brian C. Lemaux, Olga Cucciati
https://arxiv.org/abs/2510.07445

LATIS: Galaxy-Environment Relations at Cosmic Noon and the Role of Sample Selection
We investigate the environmental dependence of galaxy properties at $z\sim2.5$ using the Ly$α$ Tomography IMACS Survey (LATIS), which provides high-resolution three-dimensional maps of intergalactic medium (IGM) overdensity via Ly$α$ forest tomography. Our analysis focuses on a UV-selected spectroscopic sample of 2185 galaxies from LATIS and a complementary set of 1157 galaxies from heterogeneous spectroscopic surveys in the COSMOS field. We compare these datasets to forward-modeled mock cata…

Resolved Profiles of Stellar Mass, Star Formation Rate, and Predicted CO-to-H$_2$ Conversion Factor Across Thousands of Local Galaxies
Jiayi Sun, Yu-Hsuan Teng, I-Da Chiang, Adam K. Leroy, Karin Sandstrom, Jakob den Brok, Alberto D. Bolatto, Jeremy Chastenet, Ryan Chown, Annie Hughes, Eric W. Koch, Thomas G. Williams
https://arxiv.org/abs/…

Resolved Profiles of Stellar Mass, Star Formation Rate, and Predicted CO-to-H$_2$ Conversion Factor Across Thousands of Local Galaxies
We present radial profiles of surface brightness in UV and IR bands, estimate stellar mass surface density ($Σ_\star$) and star formation rate surface density ($Σ_\mathrm{SFR}$), and predict the CO-to-H$_2$ conversion factor ($α_\mathrm{CO}$) for over 5,000 local galaxies with stellar mass $M_\star\,{\geq}\,10^{9.3}\rm\,M_\odot$. We build these profiles and measure galaxy half-light radii using GALEX and WISE images from the $z$0MGS program, with special care given to highly inclined galaxie…

The Star-forming Main Sequence and Bursty Star-formation Histories at $z>1.4$ in JADES and AURORA
Leonardo Clarke, Alice E. Shapley, Natalie Lam, Michael W. Topping, Gabriel B. Brammer, Ryan L. Sanders, Naveen A. Reddy, Shreya Karthikeyan
https://arxiv.org/abs/2510.06681

The Star-forming Main Sequence and Bursty Star-formation Histories at $z>1.4$ in JADES and AURORA
We analyze JWST spectroscopic and HST+JWST photometric observations of 659 star-forming galaxies at $1.4 < z < 9$ from DR3 of the JADES survey and the AURORA Cycle 1 program. We measure the star-forming main sequence (SFMS) for galaxies above $10^{8.5}\rm\ M_\odot$ where the sample is largely representative, estimating star-formation rates (SFRs) using the H$α$ line flux and rest-frame far UV (1600Å) continuum measurements, each independently corrected for dust attenuation. We find that the i…

A GLIMPSE into the very faint-end of the H$\beta$ [OIII]$\lambda\lambda$4960,5008 luminosity function at z=7-9 behind Abell S1063
Damien Korber, Iryna Chemerynska, Lukas J. Furtak, Hakim Atek, Ryan Endsley, Daniel Schaerer, John Chisholm, Alberto Saldana-Lopez, Angela Adamo, Julian B. Mu\~noz, Pascal A. Oesch, Romain Meyer, Rui Marques-Chaves, Seiji Fujimoto
ht…

A GLIMPSE into the very faint-end of the H$β$+[OIII]$λλ$4960,5008 luminosity function at z=7-9 behind Abell S1063
We use the ultra-deep GLIMPSE JWST/NIRCam survey to constrain the faint-end of the H$β$+[OIII]$λλ$4960,5008 luminosity function (LF) down to $10^{39}$ erg/s at z=7-9 behind the lensed Hubble Frontier Field Abell S1063. We perform SED fitting on a Lyman-Break Galaxy sample, measuring combined H$β$+[OIII] fluxes to construct the emission-line LF. The resulting LF ($α$=-1.55 to -1.78) is flatter than the UV LF ($α<-2$), indicating a lower number density of low H$β$+[OIII] emitters at fixed …

Replaced article(s) found for astro-ph.GA. https://arxiv.org/list/astro-ph.GA/new
[1/1]:
- Not Just a Dot: the complex UV morphology and underlying properties of Little Red Dots
P. Rinaldi, et al.

Serendipitous Discovery of an Optically-Dark Ultra-Luminous Infrared Galaxy at $z$ = 3.4
N. H. Hayatsu, Zhi-Yu Zhang, R. J. Ivison, Chao-Wei Tsai, Ping Zhou, Katsuya Okoshi, Chentao Yang, Yuri Nishimura, Kotaro Kohno, Nobunari Kashikawa, Masahiro Nagashima, Junfeng Wang, Denis Burgarella
https://arxiv.org/abs/2510.00590

Serendipitous Discovery of an Optically-Dark Ultra-Luminous Infrared Galaxy at $z$ = 3.4
Dusty, submillimeter-selected galaxies without optical counterparts contribute a non-negligible fraction of the star formation in the early universe. However, such a population is difficult to detect through classical optical/UV-based surveys. We report the serendipitous discovery of such an optically dark galaxy, behind the quadruply-lensed $z=2.56$ quasar, H1413+117, offset to the north by 6\arcsec. From $^{12}$CO $J=4$--3, $J=6$--5, and part of the $J=13$--12 transitions, which all spatially…

Euclid: Discovery of bright $z\simeq7$ Lyman-break galaxies in UltraVISTA and Euclid COSMOS
R. G. Varadaraj, R. A. A. Bowler, M. J. Jarvis, J. R. Weaver, E. Ba\~nados, P. Holloway, K. I. Caputi, S. M. Wilkins, D. Yang, B. Milvang-Jensen, L. Gabarra, P. A. Oesch, A. Amara, S. Andreon, N. Auricchio, C. Baccigalupi, M. Baldi, S. Bardelli, A. Biviano, E. Branchini, M. Brescia, S. Camera, G. Ca\~nas-Herrera, V. Capobianco, C. Carbone, J. Carretero, M. Castellano, G. Castignani, S. Cavuoti, …

Euclid: Discovery of bright $z\simeq7$ Lyman-break galaxies in UltraVISTA and Euclid COSMOS
We present a search for $z\simeq7$ Lyman-break galaxies using the $1.72 \, \rm{deg}^2$ near-infrared UltraVISTA survey in the COSMOS field, reaching $5\,σ$ depths in $Y$ of 26.2. We incorporate deep optical and Spitzer imaging for a full spectral energy distribution (SED) fitting analysis. We find 289 candidate galaxies at $6.5\leq z \leq 7.5$ covering $-22.6 \leq M_{\rm UV} \leq -20.2$, faint enough to overlap with Hubble Space Telescope studies. We conduct a separate selection by including c…

Characterizing the star cluster populations in Stephan's Quintet using HST and JWST observations
P. Aromal, S. C. Gallagher, K. Fedotov, N. Bastian, U. Lisenfeld, J. C. Charlton, P. N. Appleton, J. Braine, K. E. Johnson, P. Tzanavaris, B. H. C. Emonts, A. Togi, C. K. Xu, P. Guillard, L. Barcos-Mu\~noz, L. J. Smith, I. S. Konstantopoulos
https://

Characterizing the star cluster populations in Stephan's Quintet using HST and JWST observations
Stephan's Quintet (SQ) is a local compact galaxy group system that exhibits significant star formation activity. A history of tidal interactions between its four member galaxies and a recent collision between an intruder galaxy and the original group are associated with active star formation, particularly in many shocked regions in the intra-group medium. Using an existing star cluster candidate (SCC) catalog constructed from HST UV/optical images, we integrate flux measurements from five near-…

The Cosmic Rush Hour: Rapid Formation of Bright, Massive, Disky, Star-Forming Galaxies as Signatures of Early-Universe Physics
Xuejian Shen, Oliver Zier, Mark Vogelsberger, Michael Boylan-Kolchin, Lars Hernquist, Sandro Tacchella, Rohan P. Naidu
https://arxiv.org/abs/2509.19427

The Cosmic Rush Hour: Rapid Formation of Bright, Massive, Disky, Star-Forming Galaxies as Signatures of Early-Universe Physics
Early JWST observations have revealed a high-redshift universe more vibrant than predicted by canonical galaxy-formation models within $Λ$CDM, showing an excess of ultraviolet(UV)-bright, massive, and morphologically mature galaxies. Departures from $Λ$CDM prior to recombination can imprint signatures on non-linear structure formation at high redshift. In this paper, we investigate one such scenario - Early Dark Energy, originally proposed to resolve the Hubble tension - and its implications …