JET LUMINOSITY OF GAMMA-RAY BURSTS: THE BLANDFORD-ZNAJEK MECHANISM VERSUS THE NEUTRINO ANNIHILATION PROCESS

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	JET LUMINOSITY OF GAMMA-RAY BURSTS: THE BLANDFORD-ZNAJEK MECHANISM VERSUS THE NEUTRINO ANNIHILATION PROCESS
	Liu, T; Hou, SJ; Xue, L; Gu, WM
刊名	ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
	2015
卷号	218 期号:1 页码:12
关键词	accretion, accretion disks black hole physics gamma-ray burst: general neutrinos
通讯作者	Liu, T (reprint author), Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China.
英文摘要	A neutrino-dominated accretion flow (NDAF) around a rotating stellar-mass black hole (BH) is one of the plausible candidates for the central engine of gamma-ray bursts (GRBs). Two mechanisms, i.e., the Blandford-Znajek (BZ) mechanism and the neutrino annihilation process, are generally considered to power GRBs. Using the analytic solutions from Xue et al. and ignoring the effects of the magnetic field configuration, we estimate the BZ and neutrino annihilation luminosities as functions of the disk masses and BH spin parameters to contrast the observational jet luminosities of GRBs. Our results show that although the neutrino annihilation processes could account for most GRBs, the BZ mechanism is more effective, especially for long-duration GRBs. Actually, if the energy of the afterglows and flares of GRBs is included, then the distinction between these two mechanisms is more significant. Furthermore, massive disk mass and high BH spin are beneficial for powering the high luminosities of GRBs. Finally, we discuss possible physical mechanisms that could enhance the disk mass or neutrino emission rate of NDAFs and the relevant difference between these two mechanisms.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
关键词[WOS]	COOLED ACCRETION DISKS ; BLACK-HOLE ACCRETION ; DOMINATED ACCRETION ; CENTRAL ENGINE ; GRAVITATIONAL-WAVES ; VERTICAL STRUCTURE ; RELATIVISTIC JETS ; STARS ; FLARES ; PRECESSION
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21013]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Liu, T,Hou, SJ,Xue, L,et al. JET LUMINOSITY OF GAMMA-RAY BURSTS: THE BLANDFORD-ZNAJEK MECHANISM VERSUS THE NEUTRINO ANNIHILATION PROCESS[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2015,218(1):12.
APA	Liu, T,Hou, SJ,Xue, L,&Gu, WM.(2015).JET LUMINOSITY OF GAMMA-RAY BURSTS: THE BLANDFORD-ZNAJEK MECHANISM VERSUS THE NEUTRINO ANNIHILATION PROCESS.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,218(1),12.
MLA	Liu, T,et al."JET LUMINOSITY OF GAMMA-RAY BURSTS: THE BLANDFORD-ZNAJEK MECHANISM VERSUS THE NEUTRINO ANNIHILATION PROCESS".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 218.1(2015):12.