GW170817 and the Prospect of Forming Supramassive Remnants in Neutron Star Mergers

	GW170817 and the Prospect of Forming Supramassive Remnants in Neutron Star Mergers
	Ma, Peng-Xiong; Jiang, Jin-Liang; Wang, Hao; Jin, Zhi-Ping; Fan, Yi-Zhong; Wei, Da-Ming
刊名	ASTROPHYSICAL JOURNAL
	2018
卷号	858 期号:2 页码:74
英文摘要	The gravitational wave data of GW170817 favor the equation of state (EoS) models that predict compact neutron stars (NSs), consistent with the radius constraints from X-ray observations. Motivated by such remarkable progress, we examine the fate of the remnants formed in NS mergers and focus on the roles of the angular momentum and the mass distribution of the binary NSs. In the mass-shedding limit (for which the dimensionless angular momentum equals the Keplerian value, i.e., j = j(Kep)), the adopted seven EoS models, except for H4 and ALF2, yield supramassive NSs in more than half of the mergers. However, for j less than or similar to 0.7 j(Kep), the presence or absence of a non-negligible fraction of supramassive NSs formed in the mergers depends sensitively on both the EoS and the mass distribution of the binary systems. The NS mergers with a total gravitational mass less than or similar to 2.6M(circle dot) are found to be able to shed valuable light on both the EoS model and the angular momentum of the remnants if supramassive NSs are still absent. We have also discussed the uncertainty on estimating the maximum gravitational mass of nonrotating NSs (M-max) due to the unknown j of the precollapse remnants. With the data of GW170817 and the assumption of the mass loss of 0.03 M-circle dot, we have M-max < (2.19, 2.32) M-circle dot (90% confidence level) for j = (1.0, 0.8) j(Kep), respectively.
语种	英语
WOS记录号	WOS:000431818800002
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/17995]
专题	中国科学院紫金山天文台
推荐引用方式 GB/T 7714	Ma, Peng-Xiong,Jiang, Jin-Liang,Wang, Hao,et al. GW170817 and the Prospect of Forming Supramassive Remnants in Neutron Star Mergers[J]. ASTROPHYSICAL JOURNAL,2018,858(2):74.
APA	Ma, Peng-Xiong,Jiang, Jin-Liang,Wang, Hao,Jin, Zhi-Ping,Fan, Yi-Zhong,&Wei, Da-Ming.(2018).GW170817 and the Prospect of Forming Supramassive Remnants in Neutron Star Mergers.ASTROPHYSICAL JOURNAL,858(2),74.
MLA	Ma, Peng-Xiong,et al."GW170817 and the Prospect of Forming Supramassive Remnants in Neutron Star Mergers".ASTROPHYSICAL JOURNAL 858.2(2018):74.