活动星系核中相对论电子束的物理效应

本文研究了Ｂｌａｚａｒ天体的辐射性质，提出一种新的喷流模型，即具有幂律分布的极端相对论电子团从中心核注入喷流等离子体中，它在一定的注入速度下，不仅能在喷流等离子体中激发等离子体湍动，产生电磁波的相干辐射，而且能产生强的同步辐射。利用等离子体的弱湍理论，我们研究了极端相对论电子团在喷流等离子体中的辐射过程，并详细研究了它在解释Ｂｌａｚａｒ天体辐射特性中的应用，本文认为，Ｂｌａｚａｒ天体的不稳定辐射与极端相对论电子团的无规注入、喷流等离子体的物理环境瞬息变化有关。Ｂｌａｚａｒ中快速变化的辐射偏振角摆动。产生于相对论电子团在湍动等离子体中的同步辐射过程。另外，Ｘ选和射电选的ＢＬＬａｃ天体之间的区别取决于喷流等离子体的运动状态和物理环境。

The Physics Effect of Relativistic Electron Beam in Active Galactic Nuclei

A model of the inner portions of jets for blazars is constructed in which a ultrarelativistic electron beam with a axial symmetric,power-law distribution is injected from the central core into the jet plasma with or without relativistic bulk motion.In a properly constructed inhomegeneous distribution,this beam not only drives electrostatic plasma wave turbulence in jet plasma which leads to the collective emission of electromagnetic waves,but also emits the strong synchrotron emission.Based upon the weak turbulent theory of plasma,a comparison between the collective emission of jet plasma and synchrotron emission is shown for different distributions of ultrarelativistic electron beam.The synchrotron emission of this electron beam is analysed in detail to explain the emission of blazars.The nonsteady emission in blazars may be associated with an irregular variation of injected ultrarelativistic electron beam and a transient variation of physical environment in jet plasma.The rapid polarization angle swings in blazars may arise from the interaction between ultrarelativistic electron beam and turbulent plasma.