2025RNAAS...9...22N

Query : 2025RNAAS...9...22N

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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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ATO J174.3365+30.7465 RR* 11 37 20.7864571632 +30 44 47.699738592     15.13     ~ 9 0
2 NAME UMa III Cl* 11 38 49.8 +31 04 42           ~ 22 0

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