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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 661048.0, MPI für Astronomie / Publikationen_mpia
Schwarzschild models of the Sculptor dSph galaxy
Authors:Breddels, M. A.; Helmi, A.; van den Bosch, R. C. E.; van de Ven, G.; Battaglia, G.
Date of Publication (YYYY-MM-DD):2012-01
Title of Proceedings:Assembling the Puzzle of the Milky Way
Start Page:id.03009
Volume (in Series):19
Name of Conference/Meeting:Assembling the Puzzle of the Milky Way
Audience:Not Specified
Abstract / Description:We have developed a spherically symmetric dynamical model of a dwarf spheroidal galaxy using the Schwarzschild method. This type of modelling yields constraints both on the total mass distribution (e.g. enclosed mass and scale radius) as well as on the orbital structure of the system modelled (e.g. velocity anisotropy). Therefore not only can we derive the dark matter content of these systems, but also explore possible formation scenarios. Here we present preliminary results for the Sculptor dSph. We find that the mass of Sculptor within 1 kpc is 8.5 × 107±0.05 M๏, its anisotropy profile is tangentially biased and slightly more isotropic near the center. For an NFW profile, the preferred concentration (~15) is compatible with cosmological models. Very cuspy density profiles (steeper than NFW) are strongly disfavoured for Sculptor.
Comment of the Author/Creator:Date: 2012 online, February 1, 2012
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2012EPJWC..1903009B
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