Dark matter mini-halo around the compact objects: the formation, evolution and possible contribution to the cosmic ray electrons/positrons

Abstract

Dark matter particles may be captured by a star and then thermalized in the star's core. At the endof its life a massive star collapses suddenly and a compact object is formed. The dark matter particlesredistribute accordingly. In the inelastic dark matter model, an extended dense dark mattermini-halo surrounding the neutron star may be formed. Such mini-halos may be common in the Galaxy. The electron/positron flux resulting in the annihilation of dark matter particles, however, is unable to give rise to observable signal unless a nascent mini-halo is within a distance ∼ a few 0.1 pc from the Earth.