Anisotropic dark matter stars

The properties of exotic stars are investigated. In particular, we study objects made entirely of dark matter, and we take into account intrinsic anisotropies which have been ignored so far. We obtain semianalytical solutions to the structure equations, where all quantities of interest are expressed in terms of the energy density, while the latter is computed numerically. We show that those solutions (i) are well behaved within general relativity and (ii) are capable of describing realistic astrophysical configurations. A direct comparison with their isotropic counterparts with the same radius reveals that the latter are slightly more massive.