Wednesday, April 4, 2012

1204.0655 (J. A. R. Cembranos et al.)

Dark matter origin of the gamma ray emission from the galactic center observed by HESS    [PDF]

J. A. R. Cembranos, V. Gammaldi, A. L. Maroto
We show that the gamma ray spectrum observed with the HESS array of Cherenkov telescopes coming from the Galactic Center (GC) region and identified with the source HESS J1745-290, is well fitted by the secondary photons coming from dark matter (DM) annihilation over a diffuse power-law background. The amount of photons and morphology of the signal localized within a region of few parsecs, require compressed DM profiles as those resulting from baryonic contraction, which offer $\sim 10^3$ enhancements in the signal over DM alone simulations. The fitted background from HESS data is consistent with recent Fermi-LAT observations of the same region.
View original: http://arxiv.org/abs/1204.0655

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