A Cosmic Battery
天体物理学
2009-10-30 v1
摘要
We show that the Poynting-Robertson drag effect in an optically thin advection-dominated accretion flow around active gravitating objects generates strong azimuthal electric currents which give rise to astrophysically significant magnetic fields. Although the mechanism is most effective in accreting compact objects, it seems very promising to also account for the generation of stellar dipolar fields during the late protostellar collapse phase, when the star approaches the main sequence.
关键词
引用
@article{arxiv.astro-ph/9808223,
title = {A Cosmic Battery},
author = {Ioannis Contopoulos and Demosthenes Kazanas},
journal= {arXiv preprint arXiv:astro-ph/9808223},
year = {2009}
}
备注
12 pages Latex, 1 postscript figure, to appear in the Astrophysical Journal