Emergence of magnetic null points in electro-vacuum magnetospheres of compact objects: The case of a plunging neutron star

Conference paper

Emergence of magnetic null points in electro-vacuum magnetospheres of compact objects: The case of a plunging neutron star

Kopáček O.; Tahamtan T.; Karas V.

In: Proceedings of RAGtime 20-22, Opava, Czech Republic, pp. 165 - 174 (2020)

Abstract

Relativistic effects of compact objects onto electromagnetic fields in their vicinity are investigated using the test-field approximation. In particular, we study the possible emergence of magnetic null points which are astrophysically relevant for the processes of magnetic reconnection. While the magnetic reconnection occurs in the presence of plasma and may lead to violent mass ejection, we show here that strong gravitation of the supermassive black hole may actively support the process by suitably entangling the field lines even in the electro-vacuum description. In this contribution we further discuss the case of a dipole-type magnetic field of the neutron star on the plunging trajectory to the supermassive black hole. While we have previously shown that given model in principle admits the formation of magnetic null points, here we explore whether and where the null points appear for the astrophysically relevant values of the parameters.

Institute authors

Tahamtan, Tayebeh

Supported by

GACR 17-06962Y — Nelineární jevy ve vícekanálové astronomii černých děr
GACR 17-13525S — Sources of strong gravity and their astrophysical meaning
GACR 19-01137J — Největší černé díry na obloze: vznik a vývoj struktur na škálách horizontu

BibTeX

@inproceedings{UTF944,
  author        = {Kopáček O. and Tahamtan T. and Karas V.},
  title         = {{Emergence of magnetic null points in electro-vacuum magnetospheres of compact objects: The case of a plunging neutron star}},
  booktitle     = {Proceedings of RAGtime 20-22, Opava, Czech Republic},
  pages         = {165 - 174},
  year          = {2020},
}