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The mass content of the Sculptor dwarf spheroidal galaxy

Published online by Cambridge University Press:  01 June 2008

G. Battaglia ,
A. Helmi ,
E. Tolstoy  and
M. Irwin
G. Battaglia
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, the Netherlands European Southern Observatory, K. Schwarzschild-Str. 2, 85748 Garching, Germany email: gbattagl@eso.org
A. Helmi
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, the Netherlands
E. Tolstoy
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, the Netherlands
M. Irwin
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK
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Abstract

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We present a new determination of the mass content of the Sculptor dwarf spheroidal galaxy, based on a novel approach which takes into account the two distinct stellar populations present in this galaxy. This method helps to partially break the well-known mass-anisotropy degeneracy present in the modelling of pressure-supported stellar systems.

Keywords

techniques: spectroscopicstars: kinematicsgalaxies: dwarfgalaxies: individual (Sculptor)dark matter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Issue S254: The Galaxy Disk in Cosmological Context , June 2008 , pp. 61 - 66
Copyright
Copyright © International Astronomical Union 2009

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