What is the optimum stellar rotation rate for a collapsar?
Astrophysics
2010-11-11 v1
Abstract
We consider low angular momentum, neutrino cooled accretion flows onto newborn black holes in the context of the collapsar model for long Gamma Ray Bursts, and find a considerable energy release for rotation rates lower than those usually considered. The efficiency for the transformation of gravitational binding energy into radiation is maximized when the equatorial angular momentum l0 ~ 2 Rg c, where Rg is the Schwarzschild radius.
Cite
@article{arxiv.astro-ph/0703032,
title = {What is the optimum stellar rotation rate for a collapsar?},
author = {William H. Lee},
journal= {arXiv preprint arXiv:astro-ph/0703032},
year = {2010}
}
Comments
To appear in the proceedings of the conference "SWIFT and GRBs: Unveiling the relativistic universe", Il Nuovo Cimento"