An analytical approach to the dwarf galaxies cusp problem

Aims. An analytical solution for the discrepancy between observed core-like profiles and predicted cusp profiles in dark matter halos is studied. Methods. We calculate the distribution function for Navarro-Frenk-White halos and extract energy from the distribution, taking into account the effects of baryonic physics processes. Results. We show with a simple argument that we can reproduce the evolution of a cusp to a flat density profile by a decrease of the initial potential energy.Brazilian agency FAPESP[2009/05176-4]Brazilian agency CNPq[200297/2010-4]Brazilian agency CAPES[1313-10-0]World Premier International Research Center Initiative (WPI Initiative), MEXT, Japa