Where is the electric current driven in the Blandford-Znajek process?
Kenji Toma, Fumio Takahara
TL;DR
This paper investigates the location of electric current driving in the Blandford-Znajek process, revealing the necessity of a non-ideal MHD region in the time-dependent state for energy extraction from rotating black holes.
Contribution
It provides an analytical study of the current driving mechanism, highlighting the role of non-ideal MHD regions in the time-dependent state.
Findings
Non-ideal MHD region is required in the time-dependent state.
Steady state does not require a non-ideal MHD region.
Analysis conducted in Boyer-Lindquist and Kerr-Schild coordinates.
Abstract
The Blandford-Znajek process, the steady electromagnetic energy extraction from a rotating black hole, is widely believed to work for driving relativistic jets, although it is still under debate where the electric current is driven. We address this issue analytically by investigating the time-dependent state in the Boyer-Lindquist and Kerr-Schild coordinate systems. This analysis suggests that a non-ideal magnetohydrodynamic region is required in the time-dependent state, while not in the steady state.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.