论文标题
在SGR A*的磁层间隙中限制宇宙射线加速度
Constraining cosmic-ray acceleration in the magnetospheric gaps of Sgr A*
论文作者
论文摘要
Sagittarius A*（SGR A*）是潜在的VHE伽马射线和宇宙射线源。我们检查了SGR A*磁层中GAP型颗粒加速度的极限，这表明在当前活性阶段，质子加速度向PEV能量是可能的，并且注射功率通常限于几个10^{36} erg/s。通过间隙加速电子对环境软光子的康普顿进行扫描可能会产生与检测到的VHE点源兼容的TEV发射。我们探讨结果对积聚率变化的依赖性，表明过去较高的阶段不太可能增加功率输出，除非内部积聚本身会改变其配置。
Sagittarius A* (Sgr A*) is a potential VHE gamma-ray and cosmic-ray source. We examine limits to gap-type particle acceleration in the magnetosphere of Sgr A*, showing that in the current phase of activity proton acceleration to PeV energies is possible, with injection powers into the environment usually limited to several 10^{36} erg/s. Compton upscattering of ambient soft photons by gap-accelerated electrons could yield TeV emission compatible with the detected VHE points source. We explore the dependency of the results on changes in the accretion rate showing that higher stages in the past are unlikely to increase the power output unless the inner accretion flows itself changed its configuration.
