Issues in the Blandford-Znajek Process for GRB Inner Engine
Abstract
Several issues regarding the Blandford-Znajek process are discussed to demonstrate that it can be an effective mechanism for powering the gamma ray bursts. Using a simple circuit analysis it is argued that the disk power increases the effective power of the black hole-accretion disk system, although a part of disk power can be dissipated into black hole entropy. Within the framework of the force-free magnetosphere with the strong magnetic field, the magnetically dominated MHD flow is found to support the Blandford-Znajek process and it is demonstrated that the possible magnetic repulsion by the rotating black hole will not affect the efficiency substantially.
Cite
@article{arxiv.astro-ph/9911401,
title = {Issues in the Blandford-Znajek Process for GRB Inner Engine},
author = {Hyun Kyu Lee and G. E. Brown and R. A. M. J. Wijers},
journal= {arXiv preprint arXiv:astro-ph/9911401},
year = {2009}
}
Comments
10 pages, 1 figure, 3 references added, more discussions on the magnetic field on the black hole, accepted for publication in ApJ