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GW170817 and the Prospect of Forming Supramassive Remnants in Neutron Star Mergers
Ma, Peng-Xiong1,2; Jiang, Jin-Liang1,2; Wang, Hao1,3; Jin, Zhi-Ping1,2; Fan, Yi-Zhong1,2; Wei, Da-Ming1,2
2018-05-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume858Issue:2Pages:8
Abstract

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.

Keywordbinaries: close gravitational waves stars: neutron
DOI10.3847/1538-4357/aabafe
WOS KeywordGAMMA-RAY BURSTS ; EQUATION-OF-STATE ; MILLISECOND MAGNETAR ; ENERGY INJECTION ; DENSE MATTER ; MAXIMUM MASS ; SHORT GRBS ; FLARES ; ACCRETION ; AFTERGLOW
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000431818800002
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22007
Collection中国科学院紫金山天文台
Corresponding AuthorFan, Yi-Zhong
Affiliation1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
3.Univ Chinese Acad Sci, Yuquan Rd 19, Beijing 100049, Peoples R China
Recommended Citation
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):8.
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),8.
MLA Ma, Peng-Xiong,et al."GW170817 and the Prospect of Forming Supramassive Remnants in Neutron Star Mergers".ASTROPHYSICAL JOURNAL 858.2(2018):8.
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