Exact force-free electrodynamic solutions and their perturbations

ORAL

Abstract

This talk is an amalgamation of several works relating to finding exact force-free electrodynamic (FFE) solutions and examining their behaviour under perturbations, both analytically and numerically. The talk will briefly discuss technical points such as the choice of numerical FFE evolution systems and challenges posed by light surfaces when seeking analytical FFE solutions, presenting along the way a couple of new solutions in the near horizon extreme Kerr spacetime. It will then move on to present the mode structure of the perturbed Blandford-Znajek solution and some results concerning the stability of a family of exact propagating FFE solutions.

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Authors

  • Fan Zhang

    Beijing Normal University, Beijing Normal University, West Virginia University

  • Luis Lehner

    Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2L 2Y5, Canada, Perimeter Institute for Theoretical Physics, Perimeter Institute for Theoretical Physics, CIFAR, Perimeter Inst for Theo Phys

  • Sean McWilliams

    West Virginia University, University of West Virginia

  • Harald Pfeiffer

    Canadian Institute for Theoretical Astrophysics, University of Toronto, Canadian Institute for Theoretical Astrophysics, Canadian Institute for Theoretical Astophysics, University of Toronto, Canadian Institute for Theoretical Astrophysics, Canadian Institute for Advanced Research

  • Huan Yang

    Perimeter Institute, Perimeter Institute for Theoretical Physics, Perimeter Institute for Theoretical Physics, University of Waterloo