正电子在银心附近湮灭注入能量的限制
Restrictions on the injection energy of positrons annihilating near the Galactic center
摘要：
银河系中心正电子湮灭源的起源和性质至今仍是一个谜。正电子能量注入是区分不同正电子产生机制的标准之一。Beacom和Yueksel（2006年）提出了一种方法，根据511 keV谱线与MeV飞行湮灭通量的比值来估计这种能量。他们从COMPTEL数据中推导出正电子的最大注入能量约为几MeV，这大大减少了GC中正电子起源的一类模型，假设正电子仅通过库仑碰撞失去能量。然而，观测表明GC的磁场强度比银河系其他地方高得多，可能从100 $μ$ G到几mG不等。在这些条件下，正电子的同步加速器损失是显著的，其扩展了正电子注入能量的可接受值的范围。我们表明，如果正电子注入GC是非稳态的和磁场是高于0.4 mG的无线电和伽马射线的限制允许他们的能量高于几个GeV。
英文摘要：
The origin and properties of the source of positrons annihilating in the Galactic Center is still a mystery. One of the criterion, which may discriminate between different mechanisms of positron production there, is the positron energy injection. Beacom and Yueksel (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 cut down significantly a class of models of positron origin in the GC assuming that positrons lose their energy by Coulomb collisions only. However, observations show that the strength of magnetic field in the GC is much higher than in other parts of the Galaxy, and it may range there from 100 $μ$G to several mG. In these conditions, synchrotron losses of positrons are significant that extends the range of acceptable values of positron injection energy. We show that if positrons injection in the GC is non-stationary and magnetic field is higher than 0.4 mG both radio and gamma-ray restrictions permit their energy to be higher than several GeV.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
