Astronomy and Astrophysical Research

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.

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.

Supermassive star models reproduce spectral signatures of JWST little red dots, suggesting these compact sources may be progenitors of the first supermassive black holes.

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

A new data-driven method measures the Milky Way's circular velocity using element abundance gradients, deriving rotation parameters at the solar radius.

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.

Three ultra-faint Milky Way satellites identified in DELVE survey data, including the faintest known satellite in the outer halo and an ambiguous compact system.

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.

Study of vertical gas flows in 14 protoplanetary disks using ALMA observations reveals ubiquitous vertical motions driven by diverse physical mechanisms during planet formation.

Fast, physically consistent framework for modeling interaction-powered transients through self-consistent ejecta-CSM shock and radiative diffusion coupling.