AGN磁层中朗缪尔波的激发
Excitation of Langmuir waves in the magnetospheres of AGN
摘要：
本文在考虑广义相对论Goldreich-Julian密度表达式的基础上，研究了活动星系核磁层中朗缪尔波的激发过程。我们认为，线性化的一组方程，描述所研究的机制的动力学：欧拉方程，连续性方程和泊松方程。在解出色散关系并得到不稳定性增长率后，我们考察了它与电子和质子的相对论因子以及活动星系核的质量和光度等物理参数的关系，这些参数被认为是Kerr黑洞。结果表明，能量注入朗缪尔波的参量过程是非常有效的，静电场的振幅将呈指数放大，这可能解释了活动星系核附近区域的电子对产生、粒子加速和等离子体加热过程。
英文摘要：
In the paper we study the process of excitation of Langmuir waves in the magnetospheres of active galactic nuclei (AGN), by taking a general-relativistic expression of the Goldreich-Julian density into account. We considered the linearised set of equations which describe dynamics of the studied mechanism: the Euler equation, the continuity equation and the Poisson equation. After solving the dispersion relation and obtaining the instability growth rate, we explored it versus several physical parameters: electron's and proton's relativistic factors and the mass and luminosity of AGN, which are supposed to be Kerr black holes. We showed that the parametric process of energy pumping into the Langmuir waves is very efficient and the electrostatic field's amplitude will be exponentially amplifying, which might account for pair creation, particle acceleration and plasma heating processes in the nearby regions of AGN.
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