Gamma-Ray Constraints on Neutralino Dark Matter Clumps in the Galactic Halo
作者： Roberto Aloisio , Angela V. Olinto , Pasquale Blasi , Pasquale Blasi
DOI: 10.1086/380425
关键词: Astronomy 、 Scalar field dark matter 、 Physics 、 Dark matter 、 Light dark matter 、 Cold dark matter 、 Astrophysics 、 Galaxy 、 Milky Way 、 Galactic halo 、 Dark matter halo
摘要: According to high-resolution cold dark matter (CDM) simulations, large virialized halos are formed through the constant merging of smaller at earlier times. In particular, halo our Galaxy may have hundreds clumps. The annihilation particles such as neutralino in these clumps generates gamma-ray fluxes that can potentially be detected by future experiments GLAST. We find that, depending on parameters clump density profile and distribution Galactic halo, contribution diffuse background from constrain properties neutralinos mass cross section. model three representative profiles, singular isothermal spheres (SISs), Moore Navarro, Frenk, White (NFW) calculate spectrum angular sky flux due clumpy Galaxy. calculations carried out context two different scenarios for their concentrations, which result very conclusions.
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