Near-horizon Structure of Escape Zones of Electrically Charged Particles around Weakly Magnetized Rotating Black Hole. II. Acceleration and Escape in the Oblique Magnetosphere

0536074 - ASÚ 2021 RIV US eng J - Journal Article
Kopáček, Ondřej - Karas, Vladimír
Near-horizon Structure of Escape Zones of Electrically Charged Particles around Weakly Magnetized Rotating Black Hole. II. Acceleration and Escape in the Oblique Magnetosphere.
Astrophysical Journal. Roč. 900, č. 2 (2020), č. článku 119. ISSN 0004-637X. E-ISSN 1538-4357
R&D Projects: GA ČR(CZ) GC19-01137J; GA MŠMT(CZ) 8JCH1080
Institutional support: RVO:67985815
Keywords : black hole physics * chaos * jets
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.877, year: 2020
Method of publishing: Limited access
https://doi.org/10.3847/1538-4357/ababa8

Here we relax this assumption and investigate nonaxisymmetric systems in which the magnetic field is arbitrarily inclined with respect to the black hole spin. We study the system numerically in order to locate the zones of escaping trajectories and compute the maximum (terminal) escape velocity. It appears that breaking the axial symmetry (even by small inclination angles) substantially increases the fraction of escaping orbits and allows the acceleration to ultrarelativistic velocities that were excluded in the axisymmetric setup. The presence of transient chaotic dynamics in the launching region of the relativistic outflow is confirmed with chaotic indicators.
Permanent Link: http://hdl.handle.net/11104/0313913