Short GRBs: Opening Angles, Local Neutron Star Merger Rate, and Off-axis Events for GRB/GW Association

doi:10.3847/1538-4357/aab76d

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 引力波暴高能电磁对应体全天监测器（GECAM）

	Short GRBs: Opening Angles, Local Neutron Star Merger Rate, and Off-axis Events for GRB/GW Association
	Jin, Zhi-Ping; Li, Xiang; Wang, Hao; Wang, Yuan-Zhu; He, Hao-Ning; Yuan, Qiang; Zhang, Fu-Wen; Zou, Yuan-Chuan; Fan, Yi-Zhong; Wei, Da-Ming
刊名	The Astrophysical Journal
	2018
卷号	857 期号:2 页码:128
ISSN号	1538-4357
DOI	10.3847/1538-4357/aab76d
文献子类	Journal article (JA)
英文摘要	The jet breaks in the afterglow light curves of short gamma-ray bursts (SGRBs), rarely detected so far, are crucial for estimating the half-opening angles of the ejecta (Ƞj) and hence the neutron star merger rate. In this work, we report the detection of jet decline behaviors in GRB 150424A and GRB 160821B, and find Ƞj0.1 rad. Together with five events reported before 2015 and three others identified recently (GRB 050709, GRB 060614, and GRB 140903A), we have a sample consisting of nine SGRBs and one long-short GRB with reasonably estimated Ƞj. In particular, three Swift bursts in the sample have redshifts zܦ#160;0.2, with which we estimate the local neutron star merger rate density to be or if the narrowly beamed GRB 061201 is excluded. Inspired by the typical Ƞj0.1 rad found currently, we further investigate whether the off-beam GRBs (in the uniform jet model) or the off-axis events (in the structured jet model) can significantly enhance the GRB/GW association. For the former, the enhancement is at most moderate, while for the latter the enhancement can be much greater and a high GRB/GW association probability of 10% is possible. We also show that the data of GRB 160821B may contain a macronova/kilonova emission component with a temperature of 3100 K at 3.6 days after the burst and more data are needed to ultimately clarify.
语种	英语
WOS记录号	WOS:000430827000011
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/287853]
专题	引力波暴高能电磁对应体全天监测器（GECAM）
推荐引用方式 GB/T 7714	Jin, Zhi-Ping,Li, Xiang,Wang, Hao,et al. Short GRBs: Opening Angles, Local Neutron Star Merger Rate, and Off-axis Events for GRB/GW Association[J]. The Astrophysical Journal,2018,857(2):128.
APA	Jin, Zhi-Ping.,Li, Xiang.,Wang, Hao.,Wang, Yuan-Zhu.,He, Hao-Ning.,...&Wei, Da-Ming.(2018).Short GRBs: Opening Angles, Local Neutron Star Merger Rate, and Off-axis Events for GRB/GW Association.The Astrophysical Journal,857(2),128.
MLA	Jin, Zhi-Ping,et al."Short GRBs: Opening Angles, Local Neutron Star Merger Rate, and Off-axis Events for GRB/GW Association".The Astrophysical Journal 857.2(2018):128.