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The Satellite Luminosity Function of M101 into the Ultra-faint Dwarf Galaxy Regime

22 May 2020, 16:00 UTC
The Satellite Luminosity Function of M101 into the Ultra-faint Dwarf Galaxy Regime
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P. Bennet et al 2020 ApJL 893 L9
Deep Hubble imaging of four faint and ultra-faint dwarf galaxy candidates in the vicinity of M101 show that they are background galaxies, verifying that M101 is very poor in satellites in comparison to the Milky Way and M31.

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