Astrophysics · Physics & Astronomy
Cosmology & Nongalactic Astrophysics
The newest papers in Cosmology & Nongalactic Astrophysics that ReadSearch has read, newest first. Each links to its own page, with its authors, date, where it was published and the original.
206 papers, from 6 September 2026 to 5 November 2026: 206 arXiv preprints.
Get the few papers worth your time in Cosmology & Nongalactic Astrophysics every morning.
Follow Cosmology & Nongalactic Astrophysics and ReadSearch reads its new papers each day, then brings you the few worth reading, each with its key finding in a sentence.
Newest papers
Confirming HSC strong lens candidates with DESI Spectroscopy. II. Analysis of 80 galaxy-scale systems with lens redshifts above 0.8
The total mass distribution of galaxies provides a sensitive probe of the fundamental physical processes governing galaxy evolution, including gas inflow/star formation, AGN/SN feedback, galaxy…Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey: X First spectroscopic characterization of Galactic Type II Cepheids and calibration of the Period-Wesenheit-Metallicity relations
Type II Cepheids (T2Cs) are Population II pulsating stars that serve as distance indicators through their period--luminosity relation.Black Hole Seeds and Little Red Dots: Connecting Formation and Growth with a JWST Multi-Cycle Treasury Program
JWST has revealed an abundant population of faint active galactic nuclei and a new class of compact, high-redshift sources known as Little Red Dots (LRDs), whose physical nature remains debated…A multi-epoch VLBI study of compact symmetric objects as contaminants in the search for milli-lenses
The Lambda Cold Dark Matter model predicts a high abundance of low-mass dark matter halos, which can be probed through milliarcsecond-scale gravitational lensing (milli-lensing) of background…Macrocanonical Generator Networks: Data-Efficient Neural Surrogates for Amortized Physics Simulation
Many scientific simulations are computationally expensive, limiting their use in simulation-based inference, uncertainty quantification, and decision making.The PAU Survey: Self-supervised image denoising for flux-preserving photometry
Deep photometric surveys increasingly rely on low signal-to-noise imaging, where noise affects source detection, flux measurements, photometric redshifts, and sample selection.CosmoVerse Data Challenge: How Tip of the Red Giant Branch Analysis Choices Shape the Inferred Hubble Constant
Tip of the red giant branch (TRGB)-based determinations of the Hubble constant ($H_0$), the current expansion rate of the Universe, depend on choices made in selecting and analyzing stellar…Dynamics of self-gravitating halos with decaying dark matter
We study the evolution of self-gravitating spherical dark matter halos composed of dark matter particles that decay to a slightly less massive particle and a massless particle.Euclid. Predicting scaling relations for emission-line galaxies using simulated data
The Euclid spectroscopic surveys will substantially increase the number of observed emission-line galaxies.Euclid: Forecasting the number counts of bright line emitters in the Euclid Wide Survey and Euclid Deep fields
The Euclid mission will revolutionize our understanding of the visible Universe by collecting images and spectra of millions of galaxies across cosmic time and environments.DESI DR2 Results III: The Mass of the Milky Way
We present measurements of the mass of the Milky Way using distant halo stars selected from the Dark Energy Spectroscopic Instrument (DESI) Data Release 2 (DR2).The Stellar-Mass Dependence of Feedback-Driven Outflows in DESI DR1 Star-Forming Galaxies
Stellar feedback plays a key role in regulating star formation and shaping the evolution of star-forming galaxies.Recovering Missing Degrees of Freedom in Simulation-Trained Field-Level Generative Models
Simulation-trained generative models are emerging as a powerful framework for field-level inference in cosmology, particularly in strongly nonlinear regimes where analytical approaches become…Mercury (Hg): a relativistic $N$-body simulation for Horndeski gravity
We present Mercury, a relativistic $N$-body code for cosmological simulations in the $α$-basis formulation of Horndeski gravity.3D dark matter map of the JWST COSMOS-Web field using diffusion-based generative priors
Mapping the three-dimensional distribution of dark matter is key to tracing the growth of cosmic structure.Ly$α$ in Compact Broad-Line Emitters, Including Little Red Dots, Is More Closely Linked to the Host Galaxy than to the Broad-Line Nucleus
JWST has found many faint broad-line AGN at $z>4$, but it is unclear whether the Ly$α$ we see from them comes from the accreting black hole or from its host galaxy.A full chemical network treatment of supermassive black hole seed formation from dark matter annihilation or decay
The recent discoveries of high-redshift quasars at $z\sim6-10.1$ present a challenge to conventional supermassive black hole (SMBH) formation scenarios: their central SMBHs are too large to have…Estimating LuSEE-Night's Sensitivity to Cα Radio Recombination Lines
Carbon radio recombination lines (CRRLs) arising from the cold neutral medium (CNM) of the interstellar medium are potential foregrounds in the 1-50 MHz band that LuSEE-Night will observe from the…Physically Motivated Stellar Populations for Galaxies at Cosmic Dawn with a Temperature-Dependent IMF
The first few years of James Webb Space Telescope observations have identified previously undetected galaxies at $z>12$ and provided new constraints on galaxies at $z>8$.Introducing Aurora: A New Black Hole Seeding Model With Explicit Environmental Coupling
We present Aurora, a black hole seeding module for the Mimic semi-analytic framework, in which the seed mass of each newly resolved halo is set by its environment.