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 3
Weighing dark matter particles with gravitational waves
It is commonly assumed that the mass of dark matter particles cannot be determined from their gravitational effects when dark matter behaves as collisionless matter.Measuring the magnetization profiles of galaxy groups and clusters
Magnetic fields are vital in determining the physical conditions of baryons in massive halos.A GLIMPSE of Dark Matter: JWST Constraints on Early Structure Formation
While we have a solid understanding of how dark matter (DM) behaves during recombination ($z\sim 10^3$) and in the late universe ($z\lesssim$ a few), much less is known about intermediate times…Simulating and Characterizing Non-Gaussian Small-Scale Polarized Emission
Galactic foregrounds present a major challenge for cosmic microwave background (CMB) cosmology as their amplitudes exceed the target primordial $B$-mode signal.The Carousel Lens III: Joint lens convergence and source kinematic modeling
We introduce a new, independent modeling component to the Carousel Lens series by exploiting the spatially-resolved kinematics contained within the lensed arcs, which so far has remained rather…Cosmic rays in galaxy halos I: the circumgalactic transport rate and a dynamically significant cosmic-ray reservoir
Fermi-LAT observations imply that most of the cosmic rays (CRs) produced in normal star-forming galaxies escape from the discs where they are accelerated into the circumgalactic medium (CGM), but…Radio view of the Peanut cluster: merger-induced stripping and a radio halo shortly after pericentric passage
The Peanut galaxy cluster (SRGe CL0238.3+2005) offers a rare opportunity to investigate thermal and nonthermal processes only $\sim0.1$\,Gyr after pericentric passage.Reconstructing the Three-Dimensional Stellar Mass Profiles of Massive Galaxy Clusters
We investigate the three-dimensional (3D) stellar mass profiles of galaxy clusters using simulations and observations.Field-level modeling of halo and galaxy alignments
We develop an effective field theory (EFT) of intrinsic alignments at the level of spin-2 field fluctuations of large-scale structure tracers, such as the shapes of galaxies and dark matter halos.Does the Escape Fraction Prescription Shape Reionization History and Morphology?
The escape fraction of ionizing photons, $f_{\rm esc}$, is one of the least constrained quantities of the Epoch of Reionization (EoR), and the opacity of the intergalactic medium prevents its direct…Prospects for Near-Far Constraints on Reionization from Simulated LSST Observations of Milky Way Dwarf Galaxies and Stellar Streams
The NSF-DOE Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) will detect resolved stellar populations of intact dwarf galaxies and disrupted stellar streams in the Milky Way (MW)…Unveiling the nonthermal environments of NGC 3411 and NGC 5903 through new MeerKAT observations
Galaxy groups are key laboratories for investigating the interplay between active galactic nucleus (AGN) outbursts and the dynamical processes of the intra-group medium.AllBRICQS: the All-sky BRIght, Complete Quasar Survey - Quasar Selection and Final Southern $G_{\rm RP}<16$ Sample
We describe the final quasar sample from the Southern part of the All-sky BRIght, Complete Quasar Survey (AllBRICQS), which aimed to discover the remaining optically bright quasars using data from…Catastrophe Structure and Stability of Axion Stars
Axion stars are self-gravitating Bose--Einstein condensates of QCD axions or axion-like particles.Emission line stacking on cosmological scales: equivalence to two-point statistics and modelling of the observational effects
Emission line stacking measurement for cosmological line intensity mapping (LIM) contains not only the average emission line profile of the stacked sources, but usually also the clustering signal…Local Analogs of Little Red Dots: Clues to the X-ray Weakness
A major question about JWST's little red dots (LRDs) at $z\sim4-8$ is the origin of their apparent X-ray weakness.Dark Matter and MOND successes and degeneracies in reproducing SPARC rotation curves and weak lensing data
The observed rotation velocities of spiral galaxies at large scales exceed those predicted by their baryonic components, motivating the need for dark matter (DM) or Modified Newtonian Dynamics (MOND).SN Ares: A Strongly Lensed Type IIb Supernova at $\mathbf{z=1.276}$ with a Predicted 70-Year Time Delay
We present the discovery of supernova (SN) Ares, a strongly lensed supernova at $z_{\rm spec}=1.276\pm0.002$ in a massive, triply imaged host galaxy behind the MACS J0308.9+2645 galaxy cluster.Initial Conditions of Magnetized AGN Accretion Disks from Cloud Capture and Disruption
Accretion onto supermassive black holes (BHs) from the ISM can occur via capture of cold gas 'clouds' (GMCs, clumps, or overdense structures).The SIRMOS mission concept: a space-based near-IR spectroscopic survey of 100 million galaxies in the Euclid Wide Survey footprint
SIRMOS is a mission concept for a future NASA Astrophysics Explorer opportunity that aims to revolutionize our understanding of the universe by mapping the large-scale structure of galaxies in…