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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Abstract

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
Pages (from-to)L137-L140
JournalAstrophysical Journal
Volume642
Issue number2 II
DOIs
Publication statusPublished - 10 May 2006

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Keywords

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

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

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., ... Lupton, R. (2006). The field of streams: Sagittarius and its siblings. Astrophysical Journal, 642(2 II), L137-L140. https://doi.org/10.1086/504797