Jet precession in neutrino-cooled disks for gamma-ray bursts:The effects of the mass and spin of a black hole  

作　　者：刘彤 薛力 

机构地区：[1]Department of Physics and Institute of Theoretical Physics and Astrophysics,Xiamen University

出　　处：《Chinese Physics B》2012年第6期608-611,共4页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China (Grant No. 2009CB824800);the National Natural Science Foundation of China (Grant Nos. 10833002,11003016,11073015,and 11103015);the Natural Science Foundation of Fujian Province,China (Grant No. 2010J01017)

摘　　要：We present a model of jet precession driven by a neutrino-cooled disk around a spinning black hole to explain the quasi-periodic features observed in some gamma-ray burst light curves. The different orientations of the rotational axes between the outer part of a neutrino-cooled disk and a black hole result in precessions of the central black hole and the inner part of the disk. Hence, the jet arising from the neutrino annihilation above the inner disk is driven to precession. We find that the period of precession is positively correlated with the mass as well as the spin of a black hole.We present a model of jet precession driven by a neutrino-cooled disk around a spinning black hole to explain the quasi-periodic features observed in some gamma-ray burst light curves. The different orientations of the rotational axes between the outer part of a neutrino-cooled disk and a black hole result in precessions of the central black hole and the inner part of the disk. Hence, the jet arising from the neutrino annihilation above the inner disk is driven to precession. We find that the period of precession is positively correlated with the mass as well as the spin of a black hole.

关 键 词：ACCRETION accretion disks black hole physics gamma rays BURSTS 

分 类 号：P145.8[天文地球—天体物理]