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Schwarzschild models of the Sculptor dSph galaxy
- Source :
- EPJ Web of Conferences, Vol 19, p 03009 (2012)
- Publication Year :
- 2012
- Publisher :
- EDP Sciences, 2012.
-
Abstract
- 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.
Details
- Language :
- English
- ISSN :
- 20121903 and 2100014X
- Volume :
- 19
- Database :
- Directory of Open Access Journals
- Journal :
- EPJ Web of Conferences
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.f412563a72ac4bb389c6d8ac1b76ed3e
- Document Type :
- article
- Full Text :
- https://doi.org/10.1051/epjconf/20121903009