Dark Matter Annihilation at the Galactic Center

1999/06/24 by Paolo Gondolo, Joseph Silk · 33 citations
Physics and Astronomy · #Annihilation #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Center (category theory) #Cosmology #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Dark matter halo #Galactic Center #Galactic halo #Galaxies: Formation, Evolution, Phenomena #Galaxy #Halo #Hot dark matter #Light dark matter #Neutrino #Particle physics #Physics #Scalar field dark matter #astro-ph

paper · pdf · doi:10.1103/physrevlett.83.1719

published as Phys.Rev.Lett. 83 (1999) 1719-1722 · 4 pages, 5 figures

arxiv created 1999/06/24 · openalex publication_date 1999/08/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Cold dark matter near the galactic center is accreted by the central black hole into a dense spike. Particle dark matter annihilation makes the spike a compact source of photons, electrons, positrons, protons, antiprotons, and neutrinos. The spike luminosity depends on the halo density profile: halos with finite cores have unnoticeable spikes; halos with inner cusps may have spikes so bright that the absence of a neutrino signal from the galactic center already places upper limits on the density slope of the inner halo. Future neutrino telescopes observing the galactic center could probe the inner structure of the dark halo or indirectly find the nature of dark matter.

Citations

• Neutralino relic density including coannihilations

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