EVOLUTIONS OF STELLAR-MASS BLACK HOLE HYPERACCRETION SYSTEMS IN THE CENTER OF GAMMA-RAY BURSTS

被引：24

作者：

Song, Cui-Ying ^{[1
,2
]}

Liu, Tong ^{[1
,3
]}

Gu, Wei-Min ^{[1
]}

Hou, Shu-Jin ^{[4
]}

Tian, Jian-Xiang ^{[2
]}

Lu, Ju-Fu ^{[1
]}

机构：

[1] Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China

[2] Qufu Normal Univ, Dept Phys, Shandong Prov Key Lab Laser Polarizat & Informat, Jining 273165, Shandong, Peoples R China

[3] Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA

[4] Nanyang Normal Univ, Coll Phys & Elect Engn, Nanyang 473061, Henan, Peoples R China

来源：

ASTROPHYSICAL JOURNAL | 2015年 / 815卷 / 01期

基金：

中国国家自然科学基金;

关键词：

accretion; accretion disks; black hole physics; gamma-ray burst: general; neutrinos; NEUTRINO-DOMINATED ACCRETION; MILLISECOND PULSARS; CENTRAL ENGINE; GENERAL-RELATIVITY; VERTICAL STRUCTURE; ENERGY INJECTION; COOLED DISKS; 1ST SURVEY; FLARES; BINARY;

D O I：

10.1088/0004-637X/815/1/54

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 time-dependent 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.

引用

页数：6

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