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, Edward W Olszewski, D. B. Zucker

Research output: Contribution to journalArticle

115 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 (US)
JournalAstrophysical Journal
Volume686
Issue number2 PART 2
DOIs
StatePublished - 2008

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Milky Way Galaxy
telescopes
constellations
eccentrics
newton
spectrographs
kinematics
spectroscopy
mirrors
orbits
fibers
fibre

Keywords

  • Dwarf
  • Galaxies
  • Individual (Leo)
  • Local group

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Belokurov, V., Walker, M. G., Evans, N. W., Faria, D. C., Gilmore, G., Irwin, M. J., ... Zucker, D. B. (2008). Leo v: A companion of a companion of the Milky Way galaxy? Astrophysical Journal, 686(2 PART 2). https://doi.org/10.1086/592962

Leo v : A companion of a companion of the Milky Way galaxy? / Belokurov, V.; Walker, M. G.; Evans, N. W.; Faria, D. C.; Gilmore, G.; Irwin, M. J.; Koposov, S.; Mateo, M.; Olszewski, Edward W; Zucker, D. B.

In: Astrophysical Journal, Vol. 686, No. 2 PART 2, 2008.

Research output: Contribution to journalArticle

Belokurov, V, Walker, MG, Evans, NW, Faria, DC, Gilmore, G, Irwin, MJ, Koposov, S, Mateo, M, Olszewski, EW & Zucker, DB 2008, 'Leo v: A companion of a companion of the Milky Way galaxy?', Astrophysical Journal, vol. 686, no. 2 PART 2. https://doi.org/10.1086/592962
Belokurov V, Walker MG, Evans NW, Faria DC, Gilmore G, Irwin MJ et al. Leo v: A companion of a companion of the Milky Way galaxy? Astrophysical Journal. 2008;686(2 PART 2). https://doi.org/10.1086/592962
Belokurov, V. ; Walker, M. G. ; Evans, N. W. ; Faria, D. C. ; Gilmore, G. ; Irwin, M. J. ; Koposov, S. ; Mateo, M. ; Olszewski, Edward W ; Zucker, D. B. / Leo v : A companion of a companion of the Milky Way galaxy?. In: Astrophysical Journal. 2008 ; Vol. 686, No. 2 PART 2.
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