Energy dissipation and angular momentum transfer within a magnetically torqued accretion disc
High Energy Astrophysical Phenomena
2014-11-20 v1
Abstract
We discuss transportation and redistribution of energy and angular momentum in the magnetic connection (MC) process and Blandford-Payne (BP) process. The MC results in readjusting the interior viscous torque, and its effects are operative not only in but also beyond the MC region. The BP process is invoked to transfer the "excessive" angular momentum from an accretion disc. In addition, we derive a criterion for the interior viscous torque to resolve the puzzle of the overall equilibrium of angular momentum in disc accretion. It turns out that the BP efficiency of extracting angular momentum and the intensity of the outflow are required to be greater than some critical values.
Cite
@article{arxiv.0906.4241,
title = {Energy dissipation and angular momentum transfer within a magnetically torqued accretion disc},
author = {Zhao-Ming Gan and Ding-Xiong Wang and Wei-Hua Lei and Yang Li},
journal= {arXiv preprint arXiv:0906.4241},
year = {2014}
}
Comments
4 pages with 3 figures, accepted by Science in China Series G