Restrictions on the injection energy of positrons annihilating near the galactic center

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

研究成果: 雜誌貢獻會議論文同行評審


One of the interesting and still unsolved problems is the origin of 511 keV annihilation emission from the Galactic Bulge. One of the criterion, which may discriminate between different mechanisms of positron production there, is the positron energy injection. Beacom and Yüksel (2006) suggested a method to estimate this energy from the ratio of the 511 keV line to the MeV in-flight annihilation fluxes. From the COMPTEL data they derived that the maximum injection energy of positron should be about several MeV that cuts down significantly a class of models of positron origin in the GC. However, observations show that the strength of magnetic field in the GC is much higher than in other parts of the Galaxy. We show that if positrons injection in the GC is non-stationary and the magnetic field strength is higher than 0.5 mG both radio and gamma-ray restrictions permit their energy to be higher than hundreds of MeV.

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


深入研究「Restrictions on the injection energy of positrons annihilating near the galactic center」主題。共同形成了獨特的指紋。