Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 828, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/2041-8205/828/1/L6
Keywords
galaxies: clusters: individual (Coma); galaxies: evolution; galaxies: structure
Categories
Funding
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [1312376] Funding Source: National Science Foundation
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Recently a population of large, very low surface brightness, spheroidal galaxies was identified in the Coma cluster. The apparent survival of these Ultra Diffuse Galaxies (UDGs) in a rich cluster suggests that they have very high masses. Here we present the stellar kinematics of Dragonfly 44, one of the largest Coma UDGs, using a 33.5 hr integration with DEIMOS on the Keck II telescope. We find a velocity dispersion of sigma = 47(-6)(+8) km s(-1), which implies a dynamical mass of M-dyn (
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