论文标题
Kerr Black Hole的近水平极端和近极极限的无力磁层吸引子
Force-free magnetosphere attractors for near-horizon extreme and near-extreme limits of Kerr black hole
论文作者
论文摘要
我们提出了一种新的方法，可以在高度旋转的黑洞周围找到无磁力的磁层，这与天体物理喷气机的模型有关。采用Kerr Black Hole的接近Horizon Extreme Kerr（NHEK）极限，任何固定的，轴对称和常规的无力磁层都以NHEK极限降低到相同的吸引子溶液，并具有无效的电磁场强度。我们使用此吸引液解决方案作为极端Kerr Spacetime中NHEK区域的通用起点。我们证明，通过在扰动理论中进入二阶，可以在极端的Kerr黑洞周围找到磁性占主导地位的磁层。此外，我们考虑了近高级Kerr（NHEK近）限制的近野合，该限制可访问其他高度旋转黑洞的机构。同样，在这种情况下，我们发现了一种新型的无力吸引子，该吸引子可以用作无力磁层扰动构造的通用起点。最后，我们讨论了NHEK和NHEK吸引者之间的关系。
We propose a new approach to find magnetically-dominated force-free magnetospheres around highly spinning black holes, relevant for models of astrophysical jets. Employing the near-horizon extreme Kerr (NHEK) limit of the Kerr black hole, any stationary, axisymmetric and regular force-free magnetosphere reduces to the same attractor solution in the NHEK limit with null electromagnetic field strength. We use this attractor solution as the universal starting point for perturbing away from the NHEK region in the extreme Kerr spacetime. We demonstrate that by going to second order in perturbation theory, it is possible to find magnetically dominated magnetospheres around the extreme Kerr black hole. Furthermore, we consider the near-horizon near-extreme Kerr (near-NHEK) limit that provides access to a different regime of highly spinning black holes. Also in this case we find a novel force-free attractor, which can be used as the universal starting point for a perturbative construction of force-free magnetospheres. Finally, we discuss the relation between the NHEK and near-NHEK attractors.
