Galaxies & Cosmology
Galaxy formation, evolution, structure, and cosmological simulations.
astro-ph.GA · 340 papersThe impact of envelope binding energies on the merger rate density of binary compact objects
This paper investigates envelope binding energies across an extensive stellar grid, showing their significant impact on compact binary merger rates.
Radio Continuum and Water Maser Monitoring of the Outburst in HOPS 373: Free-Free Emission Does Not Respond to the Outburst
Monitoring of protostar HOPS 373 reveals its free-free emission does not respond to a luminosity outburst, challenging assumptions about accretion.
An HST Wide Field Survey of the Galactic Bulge: Overview, Strategy, and First Results
An HST survey maps the Galactic Bulge, creating a high-resolution legacy dataset and aiding future Roman exoplanet characterization.
The Pulsar Radial Acceleration Relation
This paper uses pulsar timing to test a vector generalization of the Radial Acceleration Relation, finding some support but noting solar acceleration dominance.
Constraining Galaxy Cluster Triaxiality via Weak Lensing -- I. Preparation for the Rubin Data Beyond Leading Order
This paper measures galaxy cluster projected shapes via weak lensing using DESY3 data, preparing for advanced analysis with the Rubin Observatory.
The 2MIG isolated AGNs. 3. Optical--IR variability and dust reverberation in the NLSy1 galaxies Mrk~42 and Mrk~493
This study analyzes optical-mid-infrared variability and dust reverberation in NLSy1 galaxies Mrk 42 and Mrk 493, measuring dust radii.
Chemical composition and kinematics of ionised gas in low-mass star-forming galaxies with extremely high [OIII]/[OII] ratios
This study explores chemical composition and kinematics in low-mass star-forming galaxies, linking extreme [OIII]/[OII] ratios to varied velocity dispersions.
Phase-Space Crystallization in Galactic Globular Clusters: A Gaia-Based Metric and Implications for Technosignature Searches
Researchers developed a Gaia-based metric (C_index) to quantify phase-space crystallization in globular clusters, identifying complex systems and aiding technosignature searches.
A statistical look on kinematic planes of satellite galaxies II: The physics behind their early formation in TNG50 MW/M31-like galaxies
This study reveals that kinematically persistent planes of satellite galaxies are fossil remnants of early anisotropic mass collapse driven by the Cosmic Web.
The multiple corrugations in the Galactic disk derived from the LAMOST and Gaia survey data
Using LAMOST and Gaia data, this study reveals that multiple radial corrugations provide a plausible explanation for the Milky Way disk's complex wave-like features.
Detection of an Extended Ly$α$ Halo around a $\textit{z}=6.64$ Broad Absorption Line Quasar with the Keck Cosmic Web Imager
An extended Lyα halo was detected around a z=6.64 quasar using KCWI, showing distinct kinematics and gravitationally dominated motion.
Helium emission from Balmer-dominated shocks in Type Ia supernova remnants provides constraints to their progenitor systems
Researchers discovered helium emission from Type Ia supernova remnant shocks, offering a new diagnostic for shock physics and progenitor systems.
Differences between emission and absorption tracers of spatially resolved outflows in clumpy z ~ 0.1 star-forming galaxies
Absorption tracers (Mg II, Na I D) show higher outflow velocities than emission tracers (Hα) in z~0.1 star-forming galaxies, linked to gas density tracing.
The formation of the C-19 progenitor: a primordial cluster heated by gas expulsion
The primordial C-19 stream's high velocity dispersion is explained by severe gas expulsion during its formation, reconciling conflicting observations.
Spin Parity of Spiral Galaxies VI -- A Search for Dynamical Memory in the Spin Distribution of Galaxies in HSC WIDE Survey Regions
This study finds that the spin-vector distribution of spiral galaxies is statistically random, supporting the standard cosmological model.
How do the LIGO-Virgo-KAGRA's Heavy Black Holes Form? No evidence for core-collapse Intermediate-mass black holes in GWTC-4
GWTC-4 data reveals no evidence for core-collapse intermediate-mass black holes, suggesting heavy black holes primarily form through hierarchical mergers.
A Multiwavelength Assessment Disfavoring the X-ray Binary Origin of He III Regions in Metal-Poor Star-Forming Dwarf Galaxies
A multiwavelength study disfavors X-ray binaries as the primary source of extreme-ultraviolet radiation creating He III regions in metal-poor dwarf galaxies.
A Dual-Band Centimetre Continuum Monitoring Survey of Young Stellar Objects in the Coronet Cluster
A VLA survey of Coronet Cluster YSOs reveals ubiquitous radio variability and spectral index characteristics across different evolutionary stages.
The Eye of Sauron in SN 2025ngs: a Short-plateau Cousin of SN 1998S with Evidence for a Ring-like Circumstellar Medium
SN 2025ngs is a peculiar short-plateau supernova with evidence for a ring-like circumstellar medium, spectroscopically resembling SN 1998S.
Perturbations in the parametrized wormhole spacetime and their related quasinormal modes
This paper studies electromagnetic perturbations and quasinormal modes in parametrized wormhole spacetimes, using observational bounds from Sgr A* to constrain parameters.
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