Ursa Major III/UNIONS 1: The Darkest Galaxy Ever Discovered?

Ursa Major III/UNIONS 1: The Darkest Galaxy Ever Discovered?

The recently discovered stellar system Ursa Major III/UNIONS 1 (UMa3/U1) is the faintest known Milky Way satellite to date. With a stellar mass of ${16}_{-5}^{+6}\,{M}_{\odot }$ and a half-light radius of 3 ± 1 pc, it is either the darkest galaxy ever discovered or the faintest self-gravitating star...

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Bibliographic Details
Main Authors:	Raphaël Errani, Julio F. Navarro, Simon E. T. Smith, Alan W. McConnachie
Format:	Article
Language:	English
Published:	IOP Publishing 2024-01-01
Series:	The Astrophysical Journal
Subjects:	Cold dark matter Dwarf spheroidal galaxies Low surface brightness galaxies the Milky Way N-body simulations Star clusters
Online Access:	https://doi.org/10.3847/1538-4357/ad2267

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