2008/04/01 by Y. P. Wang, Y. Lu, Yuexiang Lu +1
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Cosmic Phenomena #Diffusion #Galactic Center #Galaxy #Gamma-ray bursts and supernovae #Hadron #Interstellar medium #Nuclear physics #Physics #Spectral index #Spectral line #Stars #astro-ph
paper · pdf · doi:10.1017/s174392130802317x
2 pages, IAU Symposium 252
openalex publication_date 2008/04/01 · arxiv created 2008/05/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract About 10 TeV γ-ray emission within 10 pc region from the Galactic Center had been reported by 4 independent groups. Considering that this TeV γ-ray emission is produced via a hadronic model, and the relativistic protons came from the tidal disruption of stars by massive black holes, we investigate the spectral nature of the injected relativistic protons required by the hadronic model. The calculation was carried on the tidal disruption of the different types of stars and the different propagation mechanisms of protons in the interstellar medium. Compared with the observation data from HESS, we find for the best fitting that the power-law index of the spectrum of the injected protons is about −1.9, when a red giant star is tidally disrupted, and the effective confinement of protons diffusion mechanism is adopted.