Diffuseγrays andp¯flux from dark matter annihilation: A model for consistent results with EGRET and cosmic ray data

2007/12/31 by Xiao-Jun Bi, Juan Zhang, Qiang Yuan · 7 citations
Physics and Astronomy · #Annihilation #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Cosmic ray #Dark Matter and Cosmic Phenomena #Dark matter #Galaxies: Formation, Evolution, Phenomena #Galaxy #Nuclear physics #Physics #Proton #Spectral line #Supernova #astro-ph #hep-ph

paper · pdf · doi:10.1103/physrevd.78.043001

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 78(4) (American Physical Society) · 29 pages, 13 figures; the published version

openalex publication_date 2008/08/04 · arxiv created 2008/10/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

In this work we develop a new propagation model for the Galactic cosmic rays based on the GALPROP code, including contributions from dark matter annihilation. Its predictions of the Galactic diffuse \ensuremathγ-ray spectra are compatible with the EGRET data in all sky regions. It also gives consistent results about the diffuse \ensuremathγ ray longitude and latitude distributions. The B/C, ¹⁰Be/⁹Be, proton, electron and antiproton spectra are in agreement with cosmic ray measurements as well. In this model we have taken a universal proton spectrum throughout the Galaxy without introducing large fluctuation, considering the proton energy loss is negligible. The dark matter annihilation signals are boosted after taking the contributions from subhalos into account. Another interesting feature of this model is that it gives a better description of the diffuse \ensuremathγ rays when taking the source distribution compatible with supernova remnants data, which is different from previous studies.

Citations

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