Moving away from the nearhorizon attractor of the extreme Kerr forcefree magnetosphere
Abstract
We consider forcefree 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 magneticallydominated. However, any stationary, axisymmetric and regular forcefree magnetosphere in extreme Kerr black hole approaches the same attractor solution in the nearhorizon extreme Kerr (NHEK) limit with null electromagnetic field. We show that by moving away from the attractor solution in the NHEK region, one finds magneticallydominated solutions in the extreme Kerr black hole with finite angular momentum outflow. This result is achieved using a perturbative analysis up to the second order.
 Publication:

Journal of Cosmology and Astroparticle Physics
 Pub Date:
 October 2020
 DOI:
 10.1088/14757516/2020/10/048
 arXiv:
 arXiv:2007.15665
 Bibcode:
 2020JCAP...10..048C
 Keywords:

 General Relativity and Quantum Cosmology;
 Astrophysics  High Energy Astrophysical Phenomena;
 High Energy Physics  Theory
 EPrint:
 33 pages, 2 figures