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T: Fachverband Teilchenphysik
T 73: Multi-messenger astronomy
T 73.6: Vortrag
Donnerstag, 2. April 2020, 17:45–18:00, H-HS X
3D-modeling of the Galactic Center explaining the diffuse gamma-ray emission — •Mehmet Guenduez1, Julia Becker Tjus1, and Dominik J. Bomans2 — 1Ruhr-Universität Bochum, Fakultät für Physik and Astronomie, RAPP Center, TP IV, 44780 Bochum, Deutschland — 2Ruhr-Universität Bochum, Fakultät für Physik and Astronomie, RAPP Center, AIRUB, 44780 Bochum, Germany
The origin of high energy cosmic rays has not yet been entirely solved. Due to their accessibility, Galactic sources allow us to study the ambient conditions. The Galactic Center, on the one hand, shows a peculiar non-thermal emission. On the other hand, the crowded and emissively active vicinity makes modeling more challenging. Previous works discussed the origin of the diffuse gamma-ray emission detected by H.E.S.S. without considering the magnetic field, although the magnetic field has a significant impact on the CR spatial profile. In this work, we use for the first time recently developed 3D models of the ambient condition, including the magnetic field configuration, mass distribution, and the photon field. In doing so and using the propagation tool CRPropa, we can involve all relevant interaction processes in the TeV- PeV regimes such as hadronic pion production, inverse Compton scattering, and gamma-ray attenuation by electromagnetic pair production. In order to identify the real source, we further present five different source set-ups based on observational hints. Hereafter, we compare our results with the measured spatial as well as energy spectra.