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 2
OASIS III: Bursty star formation drives observed galaxy sizes at $z\geq4$
We employ JWST/NIRSpec MSA PRISM spectroscopy together with NIRCam imaging to investigate the impact of star-formation variability on galaxy sizes for a representative sample of 51 galaxies at…Dust-induced reversal of the optical wavelength dependence of spiral-arm pitch angles
The classical density-wave scenario predicts a blue-to-red age--colour gradient across the spiral arms of disc galaxies as a consequence of shock-induced star formation.The Korean Space Telescope (KST): A Dedicated Space Observatory for the Dark Universe
The Korean Space Telescope (KST) is a next-generation 1.4-meter wide-field space observatory, a dedicated probe of the dark sector.Mapping cluster angular momentum with the rotational kinetic Sunyaev-Zel'dovich effect
Galaxy clusters carry angular momentum.Channelled versus Isotropic Accretion of Galaxy Groups onto Clusters: Kinematics, Spin Alignment, and Assembly Bias
Galaxy clusters grow by accreting groups from the cosmic web, but whether the route of infall (along a cluster-connected filament or from the open field) imprints a group's kinematics, spin, and…Extracting non-Gaussian information of line-intensity maps with weighted skew spectra
The bispectrum of line-intensity maps carries cosmological and astrophysical information beyond the power spectrum, but its large data vector hampers the analysis of survey data.Celia: Catalog Embeddings Learned from cosmologIcal simulAtions
Cosmological hydrodynamical simulations connect observed galaxies to cosmology and the physics of galaxy formation.Toward a Complete Interpretation of Global 21 cm Absorption Signals Using the Radio CMB
The global 21 cm signal is among the most direct probes of cosmic dawn, encoding information about when the first stars formed and how efficiently they heated their surroundings.UNIONS: Red and blue alignments of DESI DR1 galaxies
Intrinsic alignments (IA) of galaxies are a dominant source of systematics in weak-lensing cosmological analyses, and direct measurements on spectroscopic samples are the primary source of priors on…OCCAMS: A Multi-Task Learning-Based Investigation of the CMB Power Spectra
How many latent variables are needed to fit the cosmic microwave background (CMB) temperature and polarisation power spectra when a neural network is given no cosmological model, and to what extent…An Empirically Calibrated [C II] Luminosity-Halo Mass Relation for Line Intensity Mapping
Millimeter-wave line intensity mapping aims to observe the high-redshift universe through the 158 $μ$m fine-structure line of [C II], the brightest far-infrared line of star-forming galaxies.The Conditional CMB Visibility of High-Redshift X-Ray Cavities in Galaxy clusters
At high redshift, the cosmic microwave background (CMB) both cools relativistic leptons and provides seed photons for inverse-Compton (IC) X-ray emission.When precise inference is wrong: Diagnosing model misspecification with applications to cosmic dawn and reionisation
As observations of the cosmic dawn (CD) and epoch of reionisation (EoR) rapidly improve in precision, the approximate forward models used to interpret them might struggle to keep pace.From Quantum Field Fluctuations to High-Redshift AGN: Semiclassical Origins of Halo Mass Function Constraints in the JWST Era
We develop a continuous framework connecting quantum field fluctuations in the early Universe to the abundance and observable properties of galaxies and active galactic nuclei (AGN) at cosmic dawn.FOMO-Z. Optimal galaxy classification, photometric redshifts, and reconstruction of population distributions
We present FOMO-Z (Flexible Optimizer of Multi-dimensional Operators and photo-$z$s), a set of statistical methods implemented in Python for galaxy classification and probabilistic inference from…Stars Can Quench Superradiance Around Supermassive Black Holes
Light scalar fields trigger an instability around rotating black holes which drives the rapid growth of high-density bound states on astrophysically short timescales---a phenomenon known as black…Galaxy cluster thermodynamics at z=1.7: Resolved tSZ and X-ray analysis of CL J0459.6-4946
Measurements of the entropy and temperature distribution of the intracluster medium (ICM) of local clusters have proven pivotal for the study of cluster astrophysics.The Influence of Hubble Expansion on the Future Merger of the Milky Way and Andromeda
Most existing idealized simulations of galaxy mergers neglect Hubble expansion, as the local Hubble flow is curved by overdensities and the expansion effect is weak at these scales.The coupled evolution of nuclear star clusters and intermediate-mass black holes in a dwarf-galaxy merger
Nuclear star clusters (NSCs) and intermediate-mass black holes (IMBHs) are expected to coexist in low-mass galaxies and might together facilitate the coalescence and growth of IMBHs.Rare Blue-core BCGs as Optical Signatures of ICM Cooling
Blue cores in brightest cluster galaxies (BCGs) trace recent central activity associated with cooling cluster atmospheres.