Galaxies & Cosmology
Galaxy formation, evolution, structure, and cosmological simulations.
astro-ph.GA · 340 papersShape of Direct-Method Mass-Metallicity Relation with JWST: Fast-Track Nitrogen and Helium Enrichment
JWST data reveals the mass-metallicity relation from z=1-9, showing how auroral-line selection and star-formation history shape early galaxy enrichment.
HOLISMOKES XXI: Detecting strongly lensed type Ia supernovae from time series of multi-band LSST-like imaging data -- Part II
This paper extends a deep-learning framework for detecting strongly lensed Type Ia supernovae from LSST-like imaging data under more realistic conditions.
Stellar rotation and binaries in open clusters with Gaia DR3
This paper explores stellar rotation and binaries in open clusters using Gaia DR3 data, identifying new blue stragglers and characterizing eMSTOs.
Life is But a Stream: The Distribution of Planetary Systems Along Stellar Streams and their Properties
This paper uses N-body simulations to show how planetary systems survive in stellar streams, linking planet retention to a star's escape time and stream location.
A Compact Radio Ring with a Diffuse Envelope in LOFAR: Odd Radio Circle or Distinct Phenomenon?
A new compact radio ring, J1248+4826, with a diffuse envelope is discovered, challenging current ORC models and extending the population.
Near-infrared diagnostic diagrams of the gas ionization sources in nearby galaxies: a JWST NIRSpec view
This paper uses JWST NIRSpec data to develop new near-infrared diagnostic diagrams for identifying gas ionization sources in nearby galaxies.
Sensitivity of the Cherenkov Telescope Array Observatory to Gamma-Ray Signals in Dwarf Irregular Galaxies
This paper assesses the Cherenkov Telescope Array Observatory's (CTAO) sensitivity to dark matter signals in dwarf irregular galaxies.
The MeerKAT Massive Distant Clusters Survey: a search for diffuse radio emission in 30 massive SZ-selected clusters at $z > 1$
MeerKAT surveyed 30 distant galaxy clusters (z>1) for diffuse radio emission, finding halos in 27% and providing the first statistical constraints.
Revealing the cold skeleton of the Magellanic Clouds and the Magellanic Bridge with ASKAP
New ASKAP observations reveal the extensive distribution and origins of cold gas within the Magellanic Clouds and Bridge, significantly boosting survey data.
Investigating the Effects of Bars on Star Formation and Nuclear Activity of Galaxies Using DESI Survey Data
This study uses DESI data to show how galactic bars influence star formation and AGN activity, revealing a dual role in galaxy evolution.
A CNN--Transformer Denoiser for low-$S/N$ Galaxy Spectra: Stellar Population Recovery in Synthetic Tests
EUT, a CNN-Transformer denoiser, significantly improves stellar population recovery from low S/N galaxy spectra in synthetic tests.
Transport of electrons in tangled magnetic fields
This paper reviews electron transport in tangled cosmic magnetic fields, detailing how inhomogeneities and instabilities affect their movement and energy.
Matter Clustering in Astrid: Reduced Baryonic Suppression from Realistic Black Hole Dynamics
Realistic black hole dynamics in Astrid simulations show weaker baryonic suppression of matter clustering, challenging current cosmological reconciliation efforts.
The galaxy-halo connection and the dynamical evolution of a giant disc in a massive node of the Cosmic Web at z~3
A study of the Big Wheel galaxy at z~3 reveals an unexpectedly high stellar-to-halo mass ratio, suggesting efficient stellar assembly.
A Multi-parameter Fuzzy Set Framework for Classifying Red, Blue, and Green Valley Galaxies
A fuzzy set framework classifies red, blue, and green-valley galaxies more accurately using multiple galaxy properties.
Microlensing time-scales and flux magnification probabilities of a sample of 204 lensed quasars
This study statistically analyzes microlensing in 204 lensed quasars, estimating source sizes, microlens mass fractions, and high-magnification event probabilities.
The Keplerian disk, envelope, and streamers surrounding an early O-type protostar in the Sagittarius C cloud of the Central Molecular Zone
ALMA observations reveal a Keplerian disk, envelope, and streamers around a 40 M☉ protostar in Sgr C, detailing massive star formation in the CMZ.
Not So Isolated: Green Pea Galaxies in Overdense Environments revealed by VLT/MUSE
Green Pea galaxies are found in overdense environments with companions, suggesting their starbursts are driven by gas accretion rather than close mergers.
The JWST early galaxy crisis resolved by a reionization degeneracy
This paper resolves the JWST early galaxy crisis by showing a reionization degeneracy allows standard ΛCDM to explain bright z>10 galaxies.
Reddening maps of the Magellanic Clouds using spectral energy distribution fitting of red giants
New reddening maps of the LMC/SMC are created using SED fitting of red giants, revealing the impact of atmosphere models on absolute reddening.
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