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题名: GW170817 and the Prospect of Forming Supramassive Remnants in Neutron Star Mergers
作者: Ma, Peng-Xiong; Jiang, Jin-Liang; Wang, Hao; Jin, Zhi-Ping; Fan, Yi-Zhong; Wei, Da-Ming
刊名: ASTROPHYSICAL JOURNAL
出版日期: 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
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/17995
Appears in Collections:暗物质和空间天文实验室_期刊论文

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