Farthest Neighbor: The Distant Milky Way Satellite Eridanus II*
Farthest Neighbor: The Distant Milky Way Satellite Eridanus II*
Abstract We present Magellan /IMACS spectroscopy of the recently discovered Milky Way satellite Eridanus II (Eri II). We identify 28 member stars in Eri II, from which we measure a systemic radial velocity of and a velocity dispersion of . Assuming that Eri II is a dispersion-supported system in dynamical …