The GW170817/GRB 170817A/AT 2017gfo Association: Some Implications for Physics and Astrophysics

doi:10.3847/2041-8213/aa9e08

	The GW170817/GRB 170817A/AT 2017gfo Association: Some Implications for Physics and Astrophysics
	Wang, Hao; Zhang, Fu-Wen; Wang, Yuan-Zhu; Shen, Zhao-Qiang; Liang, Yun-Feng; Li, Xiang; Liao, Neng-Hui; Jin, Zhi-Ping; Yuan, Qiang; Zou, Yuan-Chuan
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2017
卷号	851 期号:1 页码:L18
DOI	10.3847/2041-8213/aa9e08
英文摘要	On 2017 August 17, a gravitational-wave event (GW170817) and an associated short gamma-ray burst (GRB 170817A) from a binary neutron star merger had been detected. The follow-up optical/infrared observations also identified the macronova/kilonova emission (AT 2017gfo). In this work, we discuss some implications of the remarkable GW170817/GRB 170817A/AT 2017gfo association. We show that the similar to 1.7 s time delay between the gravitational-wave (GW) and GRB signals imposes very tight constraints on the superluminal movement of gravitational waves (i.e., the relative departure of GW velocity from the speed of light is. <= 4.3 x 10(-16)) or the possible violation of the weak equivalence principle (i.e., the difference of the gamma-ray and GW trajectories in the gravitational field of the galaxy and the local universe should be within a factor of similar to 3.4 x 10(-9)). The so-called Dark Matter Emulators and a class of contender models for cosmic acceleration ("Covariant Galileon") are ruled out as well. The successful identification of lanthanide elements in the macronova/kilonova spectrum also excludes the possibility that the progenitors of GRB 170817A are a binary strange star system. The high neutron star merger rate (inferred from both the local sGRB data and the gravitational-wave data) together with the significant ejected mass strongly suggest that such mergers are the prime sites of heavy r-process nucleosynthesis.
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/17888]
专题	中国科学院紫金山天文台
推荐引用方式 GB/T 7714	Wang, Hao,Zhang, Fu-Wen,Wang, Yuan-Zhu,et al. The GW170817/GRB 170817A/AT 2017gfo Association: Some Implications for Physics and Astrophysics[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,851(1):L18.
APA	Wang, Hao.,Zhang, Fu-Wen.,Wang, Yuan-Zhu.,Shen, Zhao-Qiang.,Liang, Yun-Feng.,...&Wei, Da-Ming.(2017).The GW170817/GRB 170817A/AT 2017gfo Association: Some Implications for Physics and Astrophysics.ASTROPHYSICAL JOURNAL LETTERS,851(1),L18.
MLA	Wang, Hao,et al."The GW170817/GRB 170817A/AT 2017gfo Association: Some Implications for Physics and Astrophysics".ASTROPHYSICAL JOURNAL LETTERS 851.1(2017):L18.