A large population of recently-quenched red-sequence dwarf galaxies in the outskirts of the Coma Cluster

Russell J. Smith, Ronald O. Marzke, Ann E. Hornschemeier +6

We analyse the stellar populations of 75 red-sequence dwarf galaxies in the Coma cluster, based on high signal-to-noise spectroscopy from the 6.5m MMT. The sample covers a luminosi…