http://arxiv.org/abs/2007.15665
We consider force-free magnetospheres around the extreme Kerr black hole. In this case there is no known exact analytic solution to force free electrodynamics which is stationary, axisymmetric and magnetically-dominated. However, any stationary, axisymmetric and regular force-free magnetosphere in extreme Kerr black hole approaches the same attractor solution in the near-horizon extreme Kerr (NHEK) limit with null electromagnetic field. We show that by moving away from the attractor solution in the NHEK region, one finds magnetically-dominated solutions in the extreme Kerr black hole with finite and negative angular momentum outflow. This result is achieved using a perturbative analysis up to the second order.
F. Camilloni, G. Grignani, T. Harmark, et. al.
Mon, 3 Aug 20
-677/58
Comments: 33 pages, 2 figures
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