Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2011-10-21
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
2 pages, 4 figures, to appear in the proceedings of "Assembling the Puzzle of the Milky Way", Le Grand Bornand (Apr. 17-22, 20
Scientific paper
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 1kpc is 8.5\times10^(7\pm0.05) M\odot, 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.
Battaglia Giuseppina
Breddels Maarten A.
Helmi Amina
van de Ven Glenn
van den Bosch Remco C. E.
No associations
LandOfFree
Schwarzschild models of the Sculptor dSph galaxy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Schwarzschild models of the Sculptor dSph galaxy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Schwarzschild models of the Sculptor dSph galaxy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-85465