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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 308853.0, MPI für Astronomie / Publikationen_mpia
A faint new Milky Way satellite in Bootes
Authors:Belokurov, V.; Zucker, D. B.; Evans, N. W.; Wilkinson, M. I.; Irwin, M. J.; Hodgkin, S.; Bramich, D. M.; Irwin, J. M.; Gilmore, G.; Willman, B.; Vidrih, S.; Newberg, H. J.; Wyse, R. F. G.; Fellhauer, M.; Hewett, P. C.; Cole, N.; Bell, E. F.; Beers, T. C.; Rockosi, C. M.; Yanny, B.; Grebel, E. K.; Schneider, D. P.; Lupton, R.; Barentine, J. C.; Brewington, H.; Brinkmann, J.; Harvanek, M.; Kleinman, S. J.; Krzesinski, J.; Long, D.; Nitta, A.; Smith, J. A.; Snedden, S. A.
Date of Publication (YYYY-MM-DD):2006
Journal Abbrev.:The Astrophysical Journal
Start Page:L111
End Page:L114
Audience:Not Specified
Abstract / Description:We announce the discovery of a new satellite of the Milky Way in the constellation of Bootes at a distance of ~60 kpc. It was found in a systematic search for stellar overdensities in the north Galactic cap using Sloan Digital Sky Survey Data Release 5. The color-magnitude diagram shows a well-defined turnoff, red giant branch, and extended horizontal branch. Its absolute magnitude is MV~-5.8 mag, which makes it one of the faintest galaxies known. The half-light radius is ~220 pc. The isodensity contours are elongated and have an irregular shape, suggesting that Boo may be a disrupted dwarf spheroidal galaxy.
Free Keywords:Galaxies: Dwarf; galaxies: individual (Bootes); Galaxies: Local Group
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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