EPISODIC JETS AS THE CENTRAL ENGINE OF GAMMA-RAY BURSTS

	EPISODIC JETS AS THE CENTRAL ENGINE OF GAMMA-RAY BURSTS
	Yuan, Feng1 ; Zhang, Bing 2
刊名	ASTROPHYSICAL JOURNAL
	2012-09-20
卷号	757 期号:1 页码:1
关键词	accretion gamma-ray burst: general ISM: jets and outflows magnetic reconnection accretion disks
英文摘要	Most gamma-ray bursts (GRBs) have erratic light curves, which demand that the GRB central engine launches an episodic outflow. Recent Fermi observations of some GRBs indicate a lack of the thermal photosphere component as predicted by the baryonic fireball model, which suggests a magnetic origin of GRBs. Given that powerful episodic jets have been observed along with continuous jets in other astrophysical black hole systems, here we propose an intrinsically episodic, magnetically dominated jet model for the GRB central engine. Accumulation and eruption of free magnetic energy in the corona of a differentially rotating, turbulent accretion flow around a hyperaccreting black hole lead to ejections of episodic, magnetically dominated plasma blobs. These blobs are accelerated magnetically, collide with each other at large radii, trigger rapid magnetic reconnection and turbulence, efficient particle acceleration, and radiation, and power the observed episodic prompt gamma-ray emission from GRBs.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	CORONAL MASS EJECTIONS ; X-RAY ; ACCRETION DISKS ; LIGHT CURVES ; BLACK-HOLES ; MAGNETOHYDRODYNAMIC SIMULATIONS ; COMPREHENSIVE ANALYSIS ; RELATIVISTIC JETS ; GRB 080916C ; MODEL
收录类别	SCI
语种	英语
WOS记录号	WOS:000309052800056
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18116]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA
推荐引用方式 GB/T 7714	Yuan, Feng,Zhang, Bing. EPISODIC JETS AS THE CENTRAL ENGINE OF GAMMA-RAY BURSTS[J]. ASTROPHYSICAL JOURNAL,2012,757(1):1.
APA	Yuan, Feng,&Zhang, Bing.(2012).EPISODIC JETS AS THE CENTRAL ENGINE OF GAMMA-RAY BURSTS.ASTROPHYSICAL JOURNAL,757(1),1.
MLA	Yuan, Feng,et al."EPISODIC JETS AS THE CENTRAL ENGINE OF GAMMA-RAY BURSTS".ASTROPHYSICAL JOURNAL 757.1(2012):1.