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Spectral study of the HESS J1745-290 gamma-ray source as dark matter signal

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López Maroto, Antonio and Ruiz Cembranos, José Alberto and Gammaldi, Viviana (2013) Spectral study of the HESS J1745-290 gamma-ray source as dark matter signal. Journal of Cosmology and Astroparticle Physics (4). ISSN 1475-7516

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Official URL: http://dx.doi.org/10.1088/1475-7516/2013/04/051


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Abstract

We study the main spectral features of the gamma-ray fluxes observed by the High Energy Stereoscopic System (HESS) from the J1745-290 Galactic Center source during the years 2004, 2005 and 2006. In particular, we show that these data are well fitted as the secondary gamma-rays photons generated from dark matter annihilating into Standard Model particles in combination with a simple power law background. We present explicit analyses for annihilation in a single standard model particle-antiparticle pair. In this case, the best fits are obtained for the u (u) over bar and d (d) over bar quark channels and for the W+W- and ZZ gauge bosons, with background spectral index compatible with the Fermi-Large Area Telescope (LAT) data from the same region. The fits return a heavy WIMP, with a mass above similar to 10 TeV, but well below the unitarity limit for thermal relic annihilation.


Item Type:Article
Additional Information:

© 2013 IOP Publishing Ltd and Sissa Medialab srl.
We thank Alvaro de la Cruz-Dombriz for useful comments. This work has been supported by MICINN (Spain) project numbers FIS 2008-01323, FIS2011-23000, FPA2011-27853-01 and Consolider Ingenio MULTIDARK CSD2009-00064.

Uncontrolled Keywords:Center Black-Hole, Galactic-Center, High-Energy, Models, Halos, Annihilation, Contraction, Telescope, Direction, Emission
Subjects:Sciences > Physics
ID Code:25690
Deposited On:12 Jun 2014 15:25
Last Modified:19 Nov 2014 12:55

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