CAN BLACK HOLE NEUTRINO-COOLED DISKS POWER SHORT GAMMA-RAY BURSTS?

被引：32
作者：
Liu, Tong [1 ,2 ,3 ,4 ,5 ]
Lin, Yi-Qing [6 ]
Hou, Shu-Jin [3 ,7 ]
Gu, Wei-Min [1 ,2 ,5 ]
机构：
[1] Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China
[2] Xiamen Univ, Inst Theoret Phys & Astrophys, Xiamen 361005, Fujian, Peoples R China
[3] Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China
[4] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
[5] Xiamen Univ, SHAO XMU Joint Ctr Astrophys, Xiamen 361005, Fujian, Peoples R China
[6] Xiamen Univ Technol, Sch Optoelect & Commun Engn, Xiamen 361024, Fujian, Peoples R China
[7] Nanyang Normal Univ, Coll Phys & Elect Engn, Nanyang 473061, Henan, Peoples R China
来源：
ASTROPHYSICAL JOURNAL | 2015年 / 806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; DOMINATED ACCRETION DISKS; BLANDFORD-ZNAJEK PROCESS; ENERGY DEPOSITION RATE; CENTRAL ENGINE; PAIR ANNIHILATION; VERTICAL STRUCTURE; MAGNETIC-FIELDS; EARLY AFTERGLOW; QUARK STARS; JET BREAK;
D O I：
10.1088/0004-637X/806/1/58
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Stellar-mass black holes (BHs) surrounded by neutrino-dominated accretion flows (NDAFs) are plausible sources of power. for. gamma-ray bursts (GRBs) via neutrino. emission and their annihilation. The progenitors of short-duration GRBs (SGRBs) are generally considered to be compact binary. mergers. According to the simulation results, the disk mass of the NDAF is limited after merger events. We can estimate such disk masses. using the current SGRB observational data and fireball model. The results show that the disk mass of a certain SGRB mainly depends on its output energy, jet opening angle, and central BH characteristics. Even for the extreme BH parameters, some SGRBs require massive disks, which approach or exceed the limits in simulations. We suggest that there may exist alternative MHD processes or mechanisms that increase the neutrino emission to produce SGRBs with reasonable BH parameters and disk masses.
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页数：7
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