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2025-07-03 09:28:30

Radial velocities and stellar populations for a sample of MATLAS survey dwarfs
Kate Southon, Jonah S. Gannon, Duncan A. Forbes, Arsen Levitskiy, Maria Luisa Buzzo, Aaron J. Romanowsky, Jean P. Brodie
arxiv.org/abs/2507.01362

Radial velocities and stellar populations for a sample of MATLAS survey dwarfs
Spectroscopic observations are essential for confirming associations, measuring kinematics, and determining stellar populations in dwarf galaxies. Here, we present Keck Cosmic Web Imager (KCWI) spectra for 12 MATLAS survey dwarfs. For 9, we confirm recession velocities consistent with their literature-assumed host galaxies. We propose revisions of the host galaxy associations for MATLAS-631, 1494, and 1938. For MATLAS-1494, our measured redshift reclassifies it from an ultra-diffuse galaxy cand…