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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 308854.0, MPI für Astronomie / Publikationen_mpia
The field of streams: Sagittarius and its siblings
Authors:Belokurov, V.; Zucker, D. B.; Evans, N. W.; Gilmore, G.; Vidrih, S.; Bramich, D. M.; Newberg, H. J.; Wyse, R. F. G.; Irwin, M. J.; Fellhauer, M.; Hewett, P. C.; Walton, N. A.; Wilkinson, M. I.; Cole, N.; Yanny, B.; Rockosi, C. M.; Beers, T. C.; Bell, E. F.; Brinkmann, J.; Ivezic, Z.; Lupton, R.
Date of Publication (YYYY-MM-DD):2006
Journal Abbrev.:The Astrophysical Journal
Start Page:L137
End Page:L140
Audience:Not Specified
Abstract / Description:We use Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5) u, g, r, i, z photometry to study Milky Way halo substructure in the area around the north Galactic cap. A simple color cut (g-r<0.4) reveals the tidal stream of the Sagittarius dwarf spheroidal galaxy, as well as a number of other stellar structures in the field. Two branches (A and B) of the Sagittarius stream are clearly visible in an RGB composite image created from three magnitude slices, and there is also evidence for a still more distant wrap behind the A branch. A comparison of these data with numerical models suggests that the shape of the Galactic dark halo is close to spherical.
Free Keywords:Galaxies: Individual: Name: Sagittarius dSph; Galaxies: Kinematics and Dynamics; Galaxies: Structure; Galaxy: Halo; Galaxies: Local Group
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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