Artículos de revistas
An analytical approach to the dwarf galaxies cusp problem
Fecha
2010Registro en:
ASTRONOMY & ASTROPHYSICS, v.524, 2010
0004-6361
10.1051/0004-6361/201015330
Autor
SOUZA, R. S. de
ISHIDA, E. E. O.
Institución
Resumen
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.