Publication: Highlights on gamma rays, neutrinos and antiprotons from TeV Dark Matter
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2016
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EDP Science
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Abstract
We analyze the possibility that the HESS γ-ray source at the Galactic center could be explained as the secondary flux produced by annihilation of TeV dark matter (DM) particles with locally enhanced density, in a region spatially compatible with the HESS observations themselves. We study the inner 100 pc considering (i) the extrapolation of several density profiles from state-of-the-art N-body þ hydrodynamics simulations of Milky Way-like galaxies, (ii) the DM spike induced by the black hole, and (iii) the DM particles scattering off by bulge stars. We show that in some cases the DM spike may provide the enhancement in the flux required to explain the cutoff in the HESS J1745-290γ-ray spectra as TeV DM. In other cases, it may help to describe the spatial tail reported by HESS II at angular scales ≲0.54° toward Sgr A*.
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© The Authors. Roma International Conference on Astroparticle Physics (RICAP) (5th. 2014. Noto, Italy). This work was supported by UCM FPI grants G/640/400/8000 (2011 Program), the Spanish MINECO projects numbers FIS2011-23000, FPA2011-27853-C02-01 and MULTIDARK CDS2009- 00064 (Consolider-Ingenio 2010 Programme). The author thanks José A. R. Cembranos and Antonio L. Maroto for their supervision and participation in the research reviewed in this contribution.