Socrates 2008 引力结合能的释放

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Title:		On the release of binding energy and accretion power in core collapse-like environments
Authors:		Socrates, Aristotle; Ramirez-Ruiz, Enrico
Publication:		eprint arXiv:0812.3917
Publication Date:		12/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		6 page Aspen conference proceeding
Bibliographic Code:		2008arXiv0812.3917S

Abstract

All accretion models of gamma-ray bursts share a common assumption: accretion power and gravitational binding energy is released and then dissipated locally, with the mass of its origin. This is equivalent to the Shakura-Sunyaev 1973 (SS73) prescription for the dissipation of accretion power and subsequent conversion into radiate output. Since their seminal paper, broadband observations of quasars and black hole X-ray binaries insist that the SS73 prescription cannot wholly describe their behavior. In particular, optically thick black hole accretion flows are almost universally accompanied by coronae whose relative power by far exceeds anything seen in studies of stellar chromospheric and coronal activity. In this note, we briefly discuss the possible repercussions of freeing accretion models of GRBs from the SS73 prescription. Our main conclusion is that the efficiency of converting gravitational binding energy into a GRB power can be increased by an order of magnitude or more.

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