期刊
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
卷 18, 期 8, 页码 1195-1203出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218271809014509
关键词
Dark matter; black hole; gamma ray astronomy
In this paper we consider dark matter particle annihilation in the gravitational field of black holes. We obtain the exact distribution function of the infalling dark matter particles, and compute the resulting flux and spectra of gamma rays coming from the objects. It is shown that the dark matter density significantly increases near a black hole. Particle collision energy becomes very high, affecting relative cross-sections of various annihilation channels. We also discuss possible experimental consequences of these effects.
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