Cosmic rays from remnants of quasars
Cosmic rays from remnants of quasars
复制标题
来自类星体残余物的宇宙射线
DOI：
10.1046/j.1365-8711.1999.02600.x
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发表时间：
1999
影响因子：
4.8
通讯作者：
P. Ghosh
中科院分区：
文献类型：
--
作者：
E. Boldt;P. Ghosh
考虑到穿越2.7 k黑体微波辐射场的质子碰撞损失，得出了这样的结论：最高能量的宇宙射线，即观测到的≥1020 eV的宇宙射线，一定来自当代的来源。鉴于这一限制，这里提出这些粒子可能在与目前不活跃的类星体残余物有关的旋转超大质量黑洞的事件视界附近加速。所需的电动势是由黑洞诱导的外部提供的磁场线穿过视界的旋转产生的。产生观测到的最高能量宇宙射线的通量对黑洞发电机来说是微不足道的损耗。即将到来的空气阵雨阵列和太空任务的观测可能会导致识别潜伏着这样黑洞的候选休眠星系。虽然迄今为止观测到的最高能量事件是在这种情况下发生的，但由于一般情况下似乎排除了向更高能量加速的可能性，因此预计光谱上限为~ 1021 eV。
Considerations of the collision losses for protons traversing the 2.7-K blackbody microwave radiation field have led to the conclusion that the highest energy cosmic rays, those observed at ≥1020 eV, must come from sources within the present epoch. In light of this constraint, it is here suggested that these particles may be accelerated near the event horizons of spinning supermassive black holes associated with presently inactive quasar remnants. The required emf is generated by the black hole induced rotation of externally supplied magnetic field lines threading the horizon. Producing the observed flux of the highest energy cosmic rays would constitute a negligible drain on the black hole dynamo. Observations with upcoming air shower arrays and space missions may lead to the identification of candidate dormant galaxies that harbour such black holes. Although the highest energy events observed so far are accounted for within the context of this scenario, a spectral upper bound at ∼1021 eV is expected since the acceleration to higher energies appears to be precluded, on general grounds.