Arianna DiCinto (Dark, Copenhagen)

The cusp-core crisis: the mass dependent density profiles for DM haloes and its applications
Wann Am 15.10.2015 von 14:30 bis 15:30
Was
  • Kolloquium
Wo SH Lecture Hall
Termin übernehmen vCal / iCal

We have derived a mass dependent (DC14) density profile based on the impact of baryonic physics on dark matter haloes that host observed galaxies, using a suite of hydrodynamically simulated galaxies. The main feature is a clear dependence of the inner slope of the dark matter density profile on the ratio between stellar-to-halo mass, with the cored most galaxies expected at a mass M*=108.5 Msun. This prediction for cusps vs cores can be applied to the Local Group, allowing to reconcile abundance matching predictions, “too big to fail” problem and star formation efficiency of such galaxies. Application of the DC14 profile on observable properties of galaxy populations, such as velocity function, mass discrepancy acceleration relation and rotation curves fitting, will be shown as well proving the validity of this modelization of dark matter haloes.