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.
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Newest papers, page 5
Self-interacting dark matter from radiative bound-state-formation feedback
Observations of galactic structure motivate sizable dark-matter self-interactions at low velocities, naturally realized through light force mediators.Leviathan: a very massive, extended sub-millimetre galaxy spectroscopically confirmed at $\rm z = 4.05$
We present Leviathan, a sub-millimetre galaxy (SMG) spectroscopically confirmed at $z=4.051$ with JWST/NIRSpec.Searching for Dense Perturbers in Cold Dark Matter Simulations
Recently, several low-mass, dense perturbers have been inferred from astrophysical observations of gravitational lensing, stellar streams, and satellite galaxies.Galactic warps constrain equivalence-principle violation in the dark sector
Current measurements of the expansion of the Universe allow for the presence of evolving dark energy, distinct from a cosmological constant, with an equation of state that seems to violate the null…Analytic and numerical study of dark matter halos in the Horndeski theory
The models of modified gravity that can explain the late-time accelerated expansion of the Universe must pass the local tests of gravity, introducing a screening mechanism so that any additional…How bright can a galaxy be? Extreme value predictions for high-redshift survey observables
Assessing the significance of extreme galaxy candidates has typically relied on redshifts and stellar / halo masses inferred through inverse modelling, which carries substantial systematic…Inferring the delay time distribution of type Ia supernovae with CAALAM I: SED modelling choices and their effect on the delay time distribution
A delay time distribution (DTD) quantifies the lag between progenitor formation and the subsequent explosive event.Galaxy bias of radio AGN and star-forming galaxies from MIGHTEE and CMB lensing
Radio galaxies play a significant role in galaxy evolution through feedback mechanisms, making it important to characterize the environments in which they reside.Clustering of JWST LRDs. Implications for PBHs and other early-forming seeds
We use the observed abundance and spatial clustering of JWST little red dots (LRDs) over z = 4--8 to confront two formation scenarios: the standard picture in which LRDs form in virialized…Learning without relearning physical symmetry: an SO(3)-equivariant convolutional network (CNN) on the sphere
Many of the most important datasets in the physical sciences live natively on the sphere, and these data often carry no preferred position or orientation.ENFR: Evidence Networks with Flow-Matched References for Amortized Simulation-Based Model Inference
The evidence, $\mathcal{Z} = p(x | \mathcal{M})$, of a data-generating model $\mathcal{M}$ is a powerful tool in Bayesian frameworks: it enables model inference, model misspecification tests, and…Revisiting the Mass and Scale Dependence of the "Lensing is Low" Effect with DECADE
Galaxy-galaxy lensing (GGL) is a critical probe of cosmology and galaxy formation.Can Blue UV-Bright Galaxies Drive Reionization at Cosmic Dawn? An $M_{\rm UV}=-19.6$ Galaxy with $f_{\rm esc}\approx0.85$ at $z=9.244$
We revisit EBG-1, a gravitationally lensed galaxy at $z = 9.244$, using newly obtained deep (14 hr) JWST/NIRSpec G235M ($R \sim 1000$) spectroscopy.A DECADE of Giants: A catalog of 42,000 optically identified galaxy clusters from 13,000 $\mathrm{deg}^2$ of the sky
Galaxy clusters are sensitive to a rich variety of physics spanning a wide dynamic range, from microphysical to cosmological scales.Testing the inelastic dark matter interpretation of the LZ event with heavy-element experiments
We consider the inelastic dark matter interpretation of the recent 248 keV event observed by LZ and identify different experiments that could test it.Resolving the Assembly of Disk Galaxies from the Epoch of Reionisation to Cosmic Noon
Most of the mass and angular momentum of today's disk galaxies assembled at $z>1$.Thermal Sunyaev-Zel'dovich Effect in the circumgalactic medium - III: does richness matter?
We measure the thermal Sunyaev-Zel'dovich Effect in the circumgalactic/intragroup medium (CGM/IGrM) of 7 million $\rm M_{200c} = 10^{12-14}$M$_\odot$ $z \leqslant 1$ DESI Legacy Survey…Mixed modified-gravity--modified-inertia MOND theories
It is plausible that in a more fundamental theory of MOND both gravity and inertia will differ from their Newtonian versions.Minkowski Functionals of CII Line Intensity Maps: Probing Astrophysics and Primordial Features
Line intensity mapping aims to measure the total cumulative light of spectral lines from galaxies, without resolving individual sources.The Radius-Luminosity Relationship for Active Galactic Nuclei with Hierarchical Bayesian Reverberation Mapping
Reverberation mapping of active galactic nuclei uses the time taken for variability to travel through the system as a measure of system size, with this size being used to inform estimates of the…