New Equations of State for Postmerger Supramassive Quark Stars | |
Li, Ang1; Zhou, Xia2; Zhu, Zhen-Yu1 | |
刊名 | ASTROPHYSICAL JOURNAL |
2017-07-20 | |
卷号 | 844期号:1页码:41 |
关键词 | Dense Matter Equation Of State Gamma-ray Burst: General Stars: Neutron Stars: Rotation |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/aa7a00 |
产权排序 | 2 |
文献子类 | Article |
英文摘要 | Binary neutron star (NS) mergers with their subsequent fast-rotating supramassive magnetars are one attractive interpretation for at least some short gamma-ray bursts (SGRBs), based on the internal plateau commonly observed in the early X-ray afterglow. The rapid decay phase in this scenario signifies the epoch when the star collapses to a black hole after it spins down, and could effectively shed light on the underlying unclear equation of state (EoS) of dense matter. In the present work, we compare the protomagnetar masses of the internal plateau sample from representative EoS models to that derived independently from the observed galactic NS-NS binary, aiming to contribute new compact star EoSs from SGRB observations. For this purpose, we employ various EoSs covering a wide range of maximum masses for both NSs and quark stars (QSs) and, at the same time, satisfying the recent observational constraints of the two massive pulsars for which the masses are precisely measured (around 2 M-circle dot). We first illustrate that how well the underlying EoS would reconcile with the current posterior mass distribution is largely determined by the static maximum mass of that EoS. We then construct three new postmerger QS EoSs (PMQS1, PMQS2, PMQS3), fully respecting the observed distribution. We also provide easy-to-use parameterizations for both the EoSs and the corresponding maximum gravitational masses of rotating stars. In addition, we calculate the fractions of postmerger products for each EoS, and discuss potential consequences for the magnetar-powered kilonova model. |
URL标识 | 查看原文 |
WOS关键词 | Gamma-ray Bursts ; Gravitational-wave Bursts ; Magnetar Central Engine ; Compact Object Mergers ; Binary Neutron-stars ; Fast Radio-bursts ; Early X-ray ; Millisecond Magnetar ; Rotating Polytropes ; Relativistic Stars |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
WOS记录号 | WOS:000406015000004 |
资助机构 | National Natural Science Foundation of China(U1431107, 11373006) ; West Light Foundation of Chinese Academy of Sciences(ZD201302) |
内容类型 | 期刊论文 |
源URL | [http://ir.xao.ac.cn/handle/45760611-7/1650] |
专题 | 脉冲星研究团组 新疆天文台_射电天文研究室 |
通讯作者 | Li, Ang |
作者单位 | 1.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Ang,Zhou, Xia,Zhu, Zhen-Yu. New Equations of State for Postmerger Supramassive Quark Stars[J]. ASTROPHYSICAL JOURNAL,2017,844(1):41. |
APA | Li, Ang,Zhou, Xia,&Zhu, Zhen-Yu.(2017).New Equations of State for Postmerger Supramassive Quark Stars.ASTROPHYSICAL JOURNAL,844(1),41. |
MLA | Li, Ang,et al."New Equations of State for Postmerger Supramassive Quark Stars".ASTROPHYSICAL JOURNAL 844.1(2017):41. |
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