A deep survey around NGC 55 finds no new satellite dwarf galaxies beyond two known ones and produces a luminosity function complete to M_V ~ -7 that is consistent with Lambda-CDM predictions.
Isochrone with age = 10 Gyr and metallicity [Fe/H] = −2 at the distance of NGC 55 is shown in red (Dotter et al
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DELVE-DEEP Survey: The Faint Satellite System of NGC 55
A deep survey around NGC 55 finds no new satellite dwarf galaxies beyond two known ones and produces a luminosity function complete to M_V ~ -7 that is consistent with Lambda-CDM predictions.