Galaxies: Formation, Evolution, Phenomena

Study reveals why optically red spiral galaxies show ultraviolet-blue colors: quenched centers with active outer disks sustained by fresh gas accretion or galaxy interactions.

Review of numerical simulation methods for fuzzy dark matter, examining wave-based and fluid-based algorithms for resolving ultralight boson dynamics on galactic scales.

Compare VLBI and Gaia DR3 astrometric measurements of 43 long period variable stars, revealing complementary strengths for determining stellar distances and proper motions across different.

SDSS-V all-sky spectroscopic survey produces validated stellar parameter catalog enabling discovery of distant halo substructures and chemically peculiar stars across the Milky Way.

Chandra X-ray observations of SPT-CL J2215-3537 resolve the cool core of this z = 1.16 relaxed galaxy cluster, establishing a high-redshift benchmark for cluster evolution studies.

Spectroscopic observations confirm that massive quiescent galaxies were surprisingly common at redshifts 2-5, challenging galaxy formation simulations.

Game-theoretic framework recasts dark energy and dark matter as emergent from cosmic memory and nonequilibrium statistics, resolving tensions and predicting testable signatures.

Stellar parameters for SDSS-V M dwarfs derived using data-driven support vector regression on BOSS spectra, validated against multiple benchmarks with quantified systematic offsets.

Simulations demonstrate that cored stellar systems remain stable within cuspy dark matter halos over Hubble timescales, refuting recent claims that such configurations would falsify cold dark matter.