Local stability of strongly magnetized black hole tori
Local stability of strongly magnetized black hole tori
复制标题
强磁化黑洞环面的局域稳定性
DOI：
10.1093/mnras/stu2676
复制
发表时间：
2014
影响因子：
4.8
通讯作者：
Julia Wilson
中科院分区：
文献类型：
--
作者：
M. Wielgus;P. C. Fragile;Ziming Wang;Julia Wilson
研究了在纯环形磁场拓扑下，强磁化相对论性环面Kerr黑洞的局部稳定性。我们的方法包括解决全色散关系数值和解决一个简化的分析处理。这两种方法都表明，这样的环面受到不稳定的非轴对称的磁旋转模式，无论这样的背景属性的气体-磁压力比和特定的角动量分布。我们表明，我们的模态分析匹配以及在全球，三维，广义相对论磁流体动力学模拟中所看到的。
We investigate the local stability of strongly magnetized relativistic tori orbiting Kerr black holes, for the case of a purely toroidal magnetic field topology. Our approach encompasses both solving the full dispersion relation numerically and solving a simplified analytic treatment. Both approaches indicate that such tori are subject to an unstable non-axisymmetric magnetorotational mode, regardless of such background properties as the gas-to-magnetic pressure ratio and specific angular momentum distribution. We demonstrate that our modal analysis matches well with what is seen in global, three-dimensional, general relativistic magnetohydrodynamic simulations.