The discovery of the faintest known Milky Way satellite using UNIONS

We present the discovery of Ursa Major III/UNIONS 1, the least luminous known satellite of the Milky Way, which is estimated to have an absolute V-band magnitude of $+2.2^{+0.4}_{-0.3}$ mag, equivalent to a total stellar mass of 16$^{+6}_{-5}$ M$_{\odot}$. Ursa Major III/UNIONS 1 was uncovered in th...

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Hauptverfasser:	Smith, Simon E. T, Cerny, William, Hayes, Christian R, Sestito, Federico, Jensen, Jaclyn, McConnachie, Alan W, Geha, Marla, Navarro, Julio, Li, Ting S, Cuillandre, Jean-Charles, Errani, Raphaël, Chambers, Ken, Gwyn, Stephen, Hammer, Francois, Hudson, Michael J, Magnier, Eugene, Martin, Nicolas
Format:	Artikel
Sprache:	eng
Schlagworte:	Physics - Astrophysics of Galaxies
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