Leo v

a companion of a companion of the Milky Way galaxy?

V. Belokurov*, M. G. Walker, N. W. Evans, D. C. Faria, G. Gilmore, M. J. Irwin, S. Koposov, M. Mateo, E. Olszewski, D. B. Zucker

*Corresponding author for this work

Research output: Contribution to journalArticle

120 Citations (Scopus)

Abstract

We report the discovery of a new Milky Way satellite in the constellation Leo, identified in data from the Sloan Digital Sky Survey. It lies at a distance of-180 kpc, and is separated by ≤⊙3° 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-173.3 ±3.1 km s-1, offset by-40 km s-1 from that of Leo IV. A simple interpretation of the kinematic data is that both objects may lie on the same stream, although the implied orbit is only modestly eccentric (e-0.2)

Original languageEnglish
Pages (from-to)L83-L86
Number of pages4
JournalAstrophysical Journal
Volume686
Issue number2
DOIs
Publication statusPublished - 2008
Externally publishedYes

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