Cui-Ying Song, Tong Liu, Wei-Min Gu, Shu-Jin Hou, Jian-Xiang Tian, and Ju-Fu Lu

2015,  ApJ, 815:54(6pp)

A neutrino-dominated accretion disk around a stellar-mass black hole (BH) can power a gamma-ray burst (GRB)
via annihilation of neutrinos launched from the disk. For the BH hyperaccretion system, high accretion rate should
trigger the violent evolution of the BH’s characteristics, which further leads to the evolution of the neutrino
annihilation luminosity. In this paper, we consider the evolution of the accretion system to analyze the mean timedependent
neutrino annihilation luminosity with the different mean accretion rates and initial BH parameters. By
time-integrating the luminosity, the total neutrino annihilation energy with the reasonable initial disk mass can
satisfy most short-duration GRBs and about half of long-duration GRBs. Moreover, the extreme Kerr BH should
exist in the cental engines of some high-luminosity GRBs. GRBs with higher energy have to request the alternative
magnetohydrodynamics processes in the centers, such as the Blandford–Znajek jet from the accretion system or the
millisecond magnetar.

Image from: http://imagine.gsfc.nasa.gov/docs/features/news/10sep08.html