De-excitation gamma-ray line emission from the galactic center

D. O. Chernyshov, V. A. Dogiel, V. Tatischeff, K. S. Cheng, C. M. Ko, W. H. Ip

研究成果: 雜誌貢獻會議論文同行評審


A future detection of de-excitation gamma-ray lines from the Galactic center region would provide unique information on the high-energy processes induced by the the central black hole and the physical conditions of the emitting region. We analyse the intensity of nuclear de-excitation lines in the direction of the Galactic center produced by subrelativistic protons, which are generated by star capture by the central black hole. With the metallicity two times higher than the solar one the total flux in gamma-ray lines of energies below 8 MeV is about 10-4cm-2s-1. The most promising lines for detection are those at 4.44 and ∼ 6.2 MeV, with a predicted flux in each line of ≈ 10-5photons cm-2s -1. We also analyze the possibility of detection of these lines by INTEGRAL and future missions.

期刊Proceedings of Science
出版狀態已出版 - 2009
事件Science Workshop to Celebrate 7 Years of Integral - The Extreme Sky: Sampling the Universe above 10 keV, Extremesky 2009 - Otranto, Lecce, Italy
持續時間: 13 10月 200917 10月 2009


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