Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-07-17
Astrophys.J.686:L83-L86,2008
Astronomy and Astrophysics
Astrophysics
Submitted to ApJ (Letters)
Scientific paper
10.1086/592962
We report the discovery of a new Milky Way dwarf spheroidal galaxy in the constellation of Leo identified in data from the Sloan Digital Sky Survey. Leo V lies at a distance of about 180 kpc, and is separated by about 3 degrees from another recent discovery, Leo IV. We present follow-up imaging from the Isaac Newton Telescope and spectroscopy from the Hectochelle fiber spectrograph at the Multiple Mirror Telescope. Leo V's heliocentric velocity is 173.4 km/s, which is offset by about 40 km/s from that of Leo IV. A simple interpretation of the kinematic data is that both objects may lie on the same stream, though the implied orbit is only modestly eccentric (e = 0.2)
Belokurov Vasily
Evans Wyn N.
Faria D. C.
Gilmore Gerard
Irwin Mary Jane
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