- Modeling the Galactic center emission from GeV to PeV
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- Amsterdam University College (AUC)
Faculty of Science (FNWI)
- Institute for Theoretical Physics Amsterdam (ITFA)
The H.E.S.S. collaboration recently reported a new analysis of the gamma-ray diffuse emission from a "semi-annulus" region of 1.4 × 10-4 steradiants around Sagittarius A∗. The gamma-ray spectral energy distribution measured from this region suggests the presence of interacting cosmic rays at PeV energies. This analysis adds a important piece to the previous measurements obtained with Fermi-LAT, H.E.S.S. and VERITAS telescopes in this particular region of the Central Molecular Zone. Here we describe this diffuse gamma-ray emission observed around the galactic center within a comprensive model implying a cosmic-ray population with a harder spectrum in the central part of the galaxy respect to the standard scenarios. With this phenomenological model we obtain the expected diffuse gamma-ray and neutrino components for this target rich region considering the energy range from GeV to PeV. While for the gamma-ray expectations we compare the results with the data of the mentioned experiments, for the expected neutrino spectra we consider the possibility to observe the signal with Cherenkov telescopes.
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- Proceedings title: RICAP16, 6th Roma International Conference on Astroparticle Physics : Roma, Italy, June 21-24, 2016
Eds.: A. Morselli, A. Capone and G. Rodriguez Fernandez
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