Self-gravitating system of semidegenerate fermions as central objects   and dark matter halos in galaxies
  We propose a unified model for dark matter haloes and central galactic objects as a self-gravitating system of semidegenerated fermions in thermal equilibrium. We consider spherical symmetry and then we solve the equations of gravitational equilibrium using the Fermi integrals in a dimensionless manner, obtaining the density profile and velocity curve. We also obtain scaling laws for the observables of the system and show that, for a wide range of our parameters, our model is consistent with the so called universality of the surface density of dark matter. 
Bernardo M.O. Fraga, Carlos R. Arguelles, Remo Ruffini
astro-ph.CO