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题名: The Allowed Parameter Space of a Long-lived Neutron Star as the Merger Remnant of GW170817
作者: Ai, Shunke; Gao, He; Dai, Zi-Gao; Wu, Xue-Feng; Li, Ang; Zhang, Bing; Li, Mu-Zi
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2018
卷号: 860, 期号:1, 页码:57
英文摘要: Due to the limited sensitivity of the current gravitational wave (GW) detectors, the central remnant of the binary neutron star (NS) merger associated with GW170817 remains an open question. In view of the relatively large total mass, it is generally proposed that the merger of GW170817 would lead to a short-lived hypermassive NS or directly produce a black hole (BH). There is no clear evidence to support or rule out a long-lived NS as the merger remnant. Here, we utilize the GW and electromagnetic (EM) signals to comprehensively investigate the parameter space that allows a long-lived NS to survive as the merger remnant of GW170817. We find that for some stiff equations of state, the merger of GW170817 could, in principle, lead to a massive NS, which has a millisecond spin period. The post-merger GW signal could hardly constrain the ellipticity of the NS. If the ellipticity reaches 10(-3), in order to be compatible with the multi-band EM observations, the dipole magnetic field of the NS (B-p) is constrained to the magnetar level of similar to 10(14) G. If the ellipticity is smaller than 10(-4), B-p is constrained to the level of similar to 10(9)-10(11) G. These conclusions weakly depend on the adoption of the NS equation of state.
语种: 英语
WOS记录号: WOS:000435102000007
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/18024
Appears in Collections:南极天文中心_期刊论文

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