Stability of a relativistic rotating electron–positron jet
Stability of a relativistic rotating electron–positron jet
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相对论旋转电子-正电子射流的稳定性
DOI：
10.1093/mnras/267.3.629
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发表时间：
1994
影响因子：
4.8
通讯作者：
V. Pariev
中科院分区：
文献类型：
--
作者：
Y. Istomin;V. Pariev
在无力近似下，电子-正电子喷流对所有的纵向运动和旋转速度的轴对称扰动都是稳定的。射流的稳定性是磁场剪切的结果，磁场剪切禁止带电流体在径向方向上的对流运动。弥散曲线ω=ω（k）在k 0 <$1/R处有一个最小值，其中R是射流半径。这导致射流内部扰动的积累，其波长为射流半径的量级。在千秒差距喷流中观察到这种类型的振荡结构，特别是在3C 273中，这显然是一种电子-正电子束
In the force-free approximation, an electron-positron jet is shown to be stable to axisymmetric perturbations for all velocities of longitudinal motion and rotation. The stability of the jet is a result of the shear of the magnetic field, which prohibits the convective motion of a charged fluid in the radial direction. The dispersion curves ω=ω(k∥) have a minimum for k∥ 0 ≃1/R, where R is the jet radius. This results in the accumulation of perturbations inside the jet with wavelengths of the order of the jet radius. This type of oscillatory structure is observed in kiloparsec jets, in particular in 3C 273, which is evidently an electron-positron beam