The field of streams: Sagittarius and its siblings

V. Belokurov, D. B. Zucker, N. W. Evans, G. Gilmore, S. Vidrih, D. M. Bramich, H. J. Newberg, R. F.G. Wyse, M. J. Irwin, M. Fellhauer, P. C. Hewett, N. A. Walton, M. I. Wilkinson, N. Cole, B. Yanny, C. M. Rockosi, T. C. Beers, E. F. Bell, J. Brinkmann, Ž IvezićR. Lupton

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738 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)L137-L140
JournalAstrophysical Journal
Issue number2 II
StatePublished - May 10 2006

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Galaxies: individual (Sagittarius dSph)
  • Galaxies: kinematics and dynamics
  • Galaxies: structure
  • Galaxy: halo
  • Local Group


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