Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2010-08-12
Phys.Rev.D82:083514,2010
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
23 pages, 13 figures, submitted
Scientific paper
10.1103/PhysRevD.82.083514
We study the possibility of detecting a signature of particle dark matter in the spectrum of gamma-ray photons from active galactic nuclei (AGNs) resulting from the scattering of high-energy particles in the AGN jet off of dark matter particles. We consider particle dark matter models in the context of both supersymmetry and universal extra-dimensions (UED), and we present the complete lowest-order calculation for processes where a photon is emitted in dark matter-electron and/or dark matter-proton scattering, where electrons and protons belong to the AGN jet. We find that the process is dominated by a resonance whose energy is dictated by the particle spectrum in the dark matter sector (neutralino and selectron for the case of supersymmetry, Kaluza-Klein photon and electron for UED). The resulting gamma-ray spectrum exhibits a very characteristic spectral feature, consisting of a sharp break to a hard power-law behavior. Although the normalization of the gamma-ray flux depends strongly on assumptions on both the AGN jet geometry, composition and particle spectrum as well as on the particle dark matter model and density distribution, we show that for realistic parameters choices, and for two prominent nearby AGNs (Centaurus A and M87), the detection of this effect is in principle possible. Finally, we compare our predictions and results with recent gamma-ray observations from the Fermi, H.E.S.S. and VERITAS telescopes.
Gorchtein Mikhail
Profumo Stefano
Ubaldi Lorenzo
No associations
LandOfFree
Probing Dark Matter with AGN Jets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Probing Dark Matter with AGN Jets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Probing Dark Matter with AGN Jets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-502515