Abstract.
We present a new velocity data set in the Draco dwarf spheroidal, containing the velocities of 159 giant stars extending to large radii. We fit this data set with a family of models parameterised by the orbital anisotropy and the dark matter halo scale. We are able to rule out a mass follows light model at the \(2.5\sigma\) significance level; we also find that Draco possesses a dark halo with a density profile producing a near-flat rotation curve.
This is a preview of subscription content, log in via an institution to check access.
Author information
Authors and Affiliations
Editor information
Rights and permissions
About this paper
Cite this paper
Kleyna, J., Wilkinson, M., Evans, N.W., Gilmore, G. First Evidence for an Extended Dark Halo in the Draco Dwarf Spheroidal. In: Bender, R., Renzini, A. (eds) The Mass of Galaxies at Low and High Redshift. ESO ASTROPHYSICS SYMPOSIA. Springer, Berlin, Heidelberg. https://doi.org/10.1007/10899892_5
Download citation
DOI: https://doi.org/10.1007/10899892_5
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-00205-5
Online ISBN: 978-3-540-36191-6
eBook Packages: Springer Book Archive