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2025RNAAS...9...22N - Research Notes of the AAS, 9, 22 (2025/January-0)

The Lack of RR Lyrae Variable in the Ultrafaint Dwarf Galaxy Ursa Major III/UNIONS 1.

NGEOW C.-C.

Abstract (from CDS):

Ursa Major III is the faintest known ultrafaint dwarf galaxy to date, and expected to lack of RR Lyrae due to its extreme faintness (MV = +2.2 mag). Using known all-sky RR Lyrae catalogs, I performed a dedicated search of RR Lyrae around Ursa Major III and found none. I concluded Ursa Major III indeed does not have any RR Lyrae.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): RR Lyrae variable stars - Compact dwarf galaxies

Simbad objects: 2

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