标题： 测试粒子在旋转喷流磁层中的加速 显示英文标题

标题： Test particle acceleration by rotating jet magnetospheres

摘要： 考虑了带电试验粒子在旋转喷流磁层基部的离心加速度。 基于力的分析，我们推导出径向加速运动方程并给出了解析解。 结果表明，沿旋转磁场线向外运动的粒子的能量增益尤其受到珠子在线近似失效的限制，该失效发生在光圆柱体$r_{L}$附近。 对于电子的最大洛伦兹因子$\gamma_{max}$的相应上限按$\propto B^{2/3} r_{L}^{2/3}$缩放，其中$B$是$r_{L}$处的磁场强度，并且对于 BL Lac 天体典型的条件，最多为$10^2-10^3$数量级。 这些值表明，此机制可能为射电喷流中较大尺度上的有效费米型粒子加速提供预加速的种子粒子。 显示英文摘要

摘要： Centrifugal acceleration of charged test particles at the base of a rotating jet magnetosphere is considered. Based on an analysis of forces we derive the equation for the radial accelerated motion and present an analytical solution. It is shown that for particles moving outwards along rotating magnetic field lines, the energy gain is in particular limited by the breakdown of the bead-on-the-wire approximation which occurs in the vicinity of the light cylinder $r_{L}$. The corresponding upper limit for the maximum Lorentz factor $\gamma_{max}$ for electrons scales $\propto B^{2/3} r_{L}^{2/3}$, with $B$ the magnetic field strength at $r_{L}$, and is at most of the order of a $10^2-10^3$ for the conditions regarded to be typical for BL Lac objects. Such values suggest that this mechanism may provide pre-accelerated seed particles which are required for efficient Fermi-type particle acceleration at larger scales in radio jets.