The Field of Streams: Sagittarius and its Siblings
Astrophysics
2010-11-11 v1
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, 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 3 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.
Cite
@article{arxiv.astro-ph/0605025,
title = {The Field of Streams: Sagittarius and its Siblings},
author = {V. Belokurov and D. B. Zucker and N. W. Evans and G. Gilmore and S. Vidrih and D. M. Bramich and H. J. Newberg and R. F. G. Wyse and M. J. Irwin and M. Fellhauer and P. C. Hewett and N. A. Walton and M. I. Wilkinson and N. Cole and B. Yanny and C. M. Rockosi and T. C. Beers and E. F. Bell and J. Brinkmann and Z. Ivesic and R. Lupton},
journal= {arXiv preprint arXiv:astro-ph/0605025},
year = {2010}
}
Comments
ApJ (Letters), in press