GIANT X-RAY BUMP IN GRB 121027A: EVIDENCE FOR FALL-BACK DISK ACCRETION

	GIANT X-RAY BUMP IN GRB 121027A: EVIDENCE FOR FALL-BACK DISK ACCRETION
	Wu, Xue-Feng1,2,3,4 ; Hou, Shu-Jin 5,6; Lei, Wei-Hua 7
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2013-04-20
卷号	767 期号:2 页码:0
关键词	accretion, accretion disks black hole physics gamma-ray burst: individual (GRB 121027A) magnetic fields
ISSN号	2041-8205
通讯作者	Wu, XF (reprint author), Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China. Email: xfwu@pmo.ac.cn ; leiwh@hust.edu.cn
英文摘要	A particularly interesting discovery in observations of GRB 121027A is that of a giant X-ray bump detected by the Swift/X-Ray Telescope. The X-ray afterglow re-brightens sharply at similar to 10(3) s after the trigger by more than two orders of magnitude in less than 200 s. This X-ray bump lasts for more than 10(4) s. It is quite different from typical X-ray flares. In this Letter we propose a fall-back accretion model to interpret this X-ray bump within the context of the collapse of a massive star for a long-duration gamma-ray burst. The required fall-back radius of similar to 3.5x10(10) cm and mass of similar to 0.9-2.6M(circle dot) imply that a significant part of the helium envelope should survive through the mass loss during the last stage of the massive progenitor of GRB 121027A.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	BLACK-HOLES ; CENTRAL ENGINE ; BURST AFTERGLOWS ; LIGHT CURVES ; FLARES ; MODELS ; ORIGIN ; ENERGY ; EXTRACTION ; SUPERNOVAE
收录类别	SCI
语种	英语
WOS记录号	WOS:000317411100016
公开日期	2014-01-08
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/9913]
专题	紫金山天文台_南极天文中心
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, Chinese Ctr Antarctic Astron, Nanjing 210008, Peoples R China 3.Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210008, Jiangsu, Peoples R China 4.Nanjing Univ, Nanjing 210008, Jiangsu, Peoples R China 5.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China 6.Xiamen Univ, Inst Theoret Phys & Astrophys, Xiamen 361005, Fujian, Peoples R China 7.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Wu, Xue-Feng,Hou, Shu-Jin,Lei, Wei-Hua. GIANT X-RAY BUMP IN GRB 121027A: EVIDENCE FOR FALL-BACK DISK ACCRETION[J]. ASTROPHYSICAL JOURNAL LETTERS,2013,767(2):0.
APA	Wu, Xue-Feng,Hou, Shu-Jin,&Lei, Wei-Hua.(2013).GIANT X-RAY BUMP IN GRB 121027A: EVIDENCE FOR FALL-BACK DISK ACCRETION.ASTROPHYSICAL JOURNAL LETTERS,767(2),0.
MLA	Wu, Xue-Feng,et al."GIANT X-RAY BUMP IN GRB 121027A: EVIDENCE FOR FALL-BACK DISK ACCRETION".ASTROPHYSICAL JOURNAL LETTERS 767.2(2013):0.