A New Signature of Dark Matter Annihilations: Gamma-Rays from Intermediate-Mass Black Holes

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dc.creatorBertone, Gianfranco
dc.creatorZentner, Andrew R.
dc.creatorSilk, Joseph
dc.date2005-09-19
dc.date.accessioned2026-07-07T11:24:46Z
dc.date.available2026-07-07T11:24:46Z
dc.descriptionWe study the prospects for detecting gamma-rays from Dark Matter (DM) annihilations in enhancements of the DM density (mini-spikes) around intermediate-mass black holes with masses in the range $10^2 \lsim M / \msun \lsim 10^6$. Focusing on two different IMBH formation scenarios, we show that, for typical values of mass and cross section of common DM candidates, mini-spikes, produced by the adiabatic growth of DM around pregalactic IMBHs, would be bright sources of gamma-rays, which could be easily detected with large field-of-view gamma-ray experiments such as GLAST, and further studied with smaller field-of-view, larger-area experiments like Air Cherenkov Telescopes CANGAROO, HESS, MAGIC and VERITAS. The detection of many gamma-ray sources not associated with a luminous component of the Local Group, and with identical cut-offs in their energy spectra at the mass of the DM particle, would provide a potential smoking-gun signature of DM annihilations and shed new light on the nature of intermediate and supermassive Black Holes.
dc.description11 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0509565
dc.identifierhttp://arxiv.org/abs/astro-ph/0509565
dc.identifierPhys.Rev.D72:103517,2005
dc.identifierdoi:10.1103/PhysRevD.72.103517
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195304
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleA New Signature of Dark Matter Annihilations: Gamma-Rays from Intermediate-Mass Black Holes
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