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 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.
Highlights
The existence of dark matter has been invoked to explain discrepancies in the observed kinematics of galaxies
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 as well as on the orbital structure of the system modelled
Summary
The existence of dark matter has been invoked to explain discrepancies in the observed kinematics of (systems of) galaxies. Schwarzschild models of the Sculptor dSph galaxy Heidelberg, Germany 3European Organisation for Astronomical Research in the Southern Hemisphere, K. We have developed a spherically symmetric dynamical model of a dwarf spheroidal galaxy using the Schwarzschild method.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
