Diversity of Galactic Rotation Curves and Self-interacting Dark Matter
Abstract
We compile a large sample of rotation curves from the literature with maximum rotation velocity spanning the range of 20-300 km/s. We model each individual system including its stellar, gas and dark matter components. We use a prescription for self-interacting dark matter (SIDM) halos that has been tested against simulations to infer the cross section for elastic scattering between dark matter particles required to explain the large cores. We discuss how the diversity of observed rotation curves and the constancy of the inferred surface density of dark matter may arise in SIDM models.
- Publication:
-
American Astronomical Society Meeting Abstracts #227
- Pub Date:
- January 2016
- Bibcode:
- 2016AAS...22733705P