Helically symmetric astrophysical jets
Helically symmetric astrophysical jets
复制标题
螺旋对称天体物理喷流
DOI：
10.1103/physreve.62.8616
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Bogoyavlenskij
中科院分区：
文献类型：
--
作者：
Bogoyavlenskij
天体物理喷流在吸积盘外被螺旋对称的MHD平衡模型所模拟。导出的平衡是平滑的，没有电流片，没有不连续。得到的MHD平衡方程的精确解推广了钱德拉塞卡均分解，并依赖于两个任意函数α (psi)和等离子体密度rho(psi)>/=0，以及2K+2个任意参数γ，a(N),a(mn),b（mn）。射流的总动能和总磁能及其质量在任何层c(1)<z<c(2)都是有限的。考虑到磁场B在横向方向上的快速减小，模拟的射流高度准直。
Astrophysical jets are modeled outside of their accretion disks by the helically symmetric MHD equilibria. The derived equilibria are smooth, have no current sheets, and no discontinuities. The obtained exact solutions to the MHD equilibrium equations generalize the Chandrasekhar equipartition solution and depend upon two arbitrary functions, alpha(psi) and the plasma density rho(psi)>/=0, and 2K+2 arbitrary parameters gamma,a(N),a(mn),b(mn). The total kinetic and magnetic energy of the jet and its mass are finite in any layer c(1)<z<c(2). In view of a rapid decreasing of the magnetic field B in the transversal direction, the modeled jets are highly collimated.