Dark Compact Planets

Titolo: Dark Compact Planets

Relatore: Dr. Laura Tolos

Abstract: A new family of compact objects formed by dark matter admixed with neutron star matter and white dwarf material is investigated. We consider non-self annihilating dark matter with an equation-of-state given by an interacting Fermi gas. We obtain new stable solutions, dark compact planets. For weakly interacting dark matter, the dark compact planets have Earth-like masses and radii from few Km to few hundred Km, whereas they have Jupiter-like masses and radii of few hundred Km for the strongly interacting dark matter case. The dark compact planets could be formed primordially and accrete white dwarf material afterwards. They could be observed as exoplanets with unusually small radii. Furthermore, we find that the recently observed 2 Msun pulsars set limits on the amount of dark matter inside neutron stars which is, at most, 10^-6 Msun.

Coordinate: martedì 10 novembre 2015, ore 11:00, aula F