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 end of its life a massive star collapses suddenly and a compact object is formed. The dark matter particles redistribute accordingly. In the inelastic dark matter model, an extended dense dark matter mini-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 \sim a few 0.1 pc from the Earth.

12 pages, 4 figures, Accepted for publication by JCAP

References in corpus (12)

• Modules for Experiments in Stellar Astrophysics (MESA)
• Observation of an anomalous positron abundance in the cosmic radiation
• First results from DAMA/LIBRA and the combined results with DAMA/NaI
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• Inelastic Dark Matter in Light of DAMA/LIBRA
• Candidates for Inelastic Dark Matter
• Direct Detection of Multi-component Secluded WIMPs
• $e^{\pm }$ Excesses in the Cosmic Ray Spectrum and Possible Interpretations
• Dark matter in the solar system II: WIMP annihilation rates in the Sun
• Capture of Inelastic Dark Matter in the Sun
• The WIMP capture process for dark stars in the early universe
• Very Old Isolated Compact Objects as Dark Matter Probes

Cited by in corpus (2)

• Dark-matter admixed white dwarfs
• Exact expressions for the pericenter precession caused by some Dark Matter distributions and constraints on them from orbital motions in the Solar System, in the double pulsar and in the Galactic center