Zalamea 2010 黑洞超吸积下的中微子碰撞

主要内容:
在Kerr度规下计算中微子流量和散射，看是否能产生伽马暴所需的能量。公式（22）给出了所能产生的能量，（23）给出了效率(中微子转换为喷流的效率)，都在可行范围内。

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Title:		Neutrino heating near hyper-accreting black holes
Authors:		Zalamea, Ivan; Beloborodov, Andrei M.
Publication:		eprint arXiv:1003.0710
Publication Date:		03/2010
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		8 pages, submitted to MNRAS
Bibliographic Code:		2010arXiv1003.0710Z

Abstract

Hyper-accretion discs around black holes emit copious neutrinos and anti-neutrinos. A fraction of the emitted neutrinos convert to electron-positron plasma above the disc through the annihilation reaction $\nu\bar\nu\to e^+e^-$. This process may drive relativistic jets associated with GRB explosions. We calculate the efficiency of energy deposition by neutrinos. Our calculation is fully relativistic and based on a geodesic-tracing method. We find that the efficiency of neutrino heating is a well-defined function of (i) accretion rate and (ii) spin of the black hole. It is practically independent of the details of neutrino transport in the opaque zone of the disc. The results help identify accretion discs whose neutrino emission can power GRBs.

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