Detection of Neutralino Annihilation Photons from External Galaxies

Details Detection of Neutralino Annihilation Photons from External Galaxies Detection of Neutralino Annihilation Photons from External Galaxies

1999-09-06

arxiv.org/abs/astro-ph/9909112v1

Phys.Rev.D61:023514,2000

Astronomy and Astrophysics

Astrophysics

revtex: 13 pages, 9 figures

Scientific paper

10.1103/PhysRevD.61.023514

We consider neutralino annihilation in dense extragalactic systems known to be dominated by dark matter, in particular M87 and several local dwarf spheroidal galaxies. These annihilations can produce energetic gamma rays which may be visible to atmospheric Cerenkov telescopes. We explore the supersymmetric parameter space, and compute the expected flux of gamma--rays coming from these objects. It is shown that some parts of the parameter space lead to a signal observable with the next generation of Cerenkov telescopes, provided the supersymmetric dark matter has a clumpy structure, as may be expected in a hierarchical scenario for structure formation.

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