Instabilities of Kelvin–Helmholtz type for Relativistic streaming
Instabilities of Kelvin–Helmholtz type for Relativistic streaming
复制标题
相对论流的开尔文-亥姆霍兹型不稳定性
DOI：
10.1093/mnras/176.2.421
复制
发表时间：
1976
影响因子：
4.8
通讯作者：
P. Scheuer
中科院分区：
文献类型：
--
作者：
B. Turland;P. Scheuer
河外无线电源的一些模型要求能量通过相对论性流从原子核转移到无线电部件，并且有必要询问这样的流将横向扩散多少并因周围物质的夹带而减慢。作为试图理解这种情况的初步尝试，我们在这里研究当相对运动是相对论时切向速度不连续处的开尔文-亥姆霍兹不稳定性，对于两种流体中的声速值可能是相对论性的，也可能不是相对论性的。我们还考虑了一半空间被粒子或光子的无碰撞气体占据的情况，因此不能将其视为流体。主要结果是在所有这些情况下都存在生长模式；已经针对多种参数计算了小扰动的增长率。
Some models of extragalactic radio sources require that energy is transferred from the nucleus to the radio components by relativistic streams, and it is pertinent to ask how much such streams would be spread out laterally and slowed down by entrainment of surrounding material. As a preliminary to attempting to understand such a situation we here investigate the Kelvin–Helmholtz instability at a tangential velocity discontinuity when the relative motion is relativistic, for values of the sound speed in the two fluids which may or may not be relativistic. We also consider the case where one half space is occupied by a collisionless gas of particles or photons, which therefore cannot be treated as a fluid. The principal result is that growing modes exist in all these cases; the growth rates of small perturbations have been calculated for a wide variety of parameters.