The sagittarius stream and halo triaxiality

  • Deg N
  • Widrow L
  • 20

    Readers

    Mendeley users who have this article in their library.
  • 36

    Citations

    Citations of this article.

Abstract

We present a mass model for the Milky Way, which is fit to observations of the Sagittarius stream together with constraints derived from a wide range of photometric and kinematic data. The model comprises a S\'{e}rsic bulge, an exponential disk, and an Einasto halo. Our Bayesian analysis is accomplished using an affine-invariant Markov chain Monte Carlo algorithm. We find that the best-fit dark matter halo is triaxial with axis ratios of $3.3\pm 0.7$ and $2.7\pm 0.4$ and with the short axis approximately aligned with the Sun-Galactic centre line. Our results are consistent with those presented in Law and Majewski (2010). Such a strongly aspherical halo is disfavoured by the standard cold dark matter scenario for structure formation.

Author-supplied keywords

  • Dynamics-Galaxy
  • Galaxy
  • Halo-Galaxy
  • Structure
  • kinematics

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • Nathan Deg

  • Lawrence Widrow

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free