The Black Hole in the Most Massive Ultracompact Dwarf Galaxy M59-UCD3
Christopher P. Ahn et al 2018 ApJ 858 102
Observations and models of the most massive ultracompact dwarf galaxy, M59-UCD3, suggest its black hole is ~4 x 106 M⊙ and indicate M59-UCD3 may be the tidally stripped remnant of a ~109–1010 M⊙ galaxy.