Variabilities of gamma-ray bursts from black hole hyper-accretion discs

被引：12
|
作者：
Lin, Da-Bin [1 ,2 ]
Lu, Zu-Jia [1 ,2 ]
Mu, Hui-Jun [3 ,4 ]
Liu, Tong [3 ,4 ,5 ]
Hou, Shu-Jin [6 ]
Lu, Jing [1 ,2 ]
Gu, Wei-Min [3 ,4 ]
Liang, En-Wei [1 ,2 ]
机构：
[1] Guangxi Univ, Dept Phys, GXU NAOC Ctr Astrophys & Space Sci, Nanning 530004, Peoples R China
[2] Guangxi Univ, Dept Phys, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China
[3] Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China
[4] Xiamen Univ, Inst Theoret Phys & Astrophys, Xiamen 361005, Fujian, Peoples R China
[5] Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA
[6] Nanyang Normal Univ, Coll Phys & Elect Engn, Nanyang 473061, Henan, Peoples R China
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 463卷 / 01期
基金：
中国国家自然科学基金;
关键词：
accretion; accretion discs; neutrinos; gamma-ray burst: general; galaxies: jets; X-rays: binaries; NEUTRINO-DOMINATED ACCRETION; RELATIVISTIC TURBULENCE; LIGHT CURVES; MAGNETOROTATIONAL TURBULENCE; EXTENDED EMISSION; TERM VARIABILITY; ENERGY INJECTION; INTERNAL SHOCKS; PROMPT EMISSION; JET FORMATION;
D O I：
10.1093/mnras/stw1985
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The emission from black hole binaries (BHBs) and active galactic nuclei (AGNs) display significant aperiodic variabilities. The most promising explanation for these variabilities is the propagating fluctuations in the accretion flow. It is natural to expect that the mechanism driving variabilities in BHBs and AGNs may operate in a black hole hyper-accretion disc, which is believed to power gamma-ray bursts (GRBs). We study the variabilities of jet power in GRBs based on the model of propagating fluctuations. It is found that the variabilities of jet power and the temporal profile of erratic spikes in this scenario are similar to those in observed light curves of prompt gamma-ray emission of GRBs. Our results show that the mechanism driving X-ray variabilities in BHBs and AGNs may operate in the central engine to drive the variabilities of GRBs.
引用
收藏
页码：245 / 250
页数：6
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