GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
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DOI：
10.1103/physrevlett.119.161101
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发表时间：
2017-10-16
影响因子：
8.6
通讯作者：
Zweizig, J.
中科院分区：
文献类型：
--
作者：
Abbott, B. P.;Abbott, R.;Zweizig, J.
2017年8月17日，世界协调时12：41：04，高级LIGO和高级处女座引力波探测器首次观测到一颗双星中子星。探测到的信号GW170817的综合信噪比为32.4，虚警率估计不到每8.0x10(4)年一次。我们推测该双星的成分质量在0.86到2.26个M圆点之间，与已知中子星的质量一致。将成分自转限制在双星中子星的自转范围内，发现成分质量在1.17-1.60M圆点范围内，系统的总质量为2.74(-0.01)(+0.04)M圆点。震源被定位在28度(90%的概率)的天空区域内，光度距离为40(-14)(+8)Mpc，这是迄今为止最接近和最精确的定位引力波信号。费米-GBM1.7 S在合并后探测到的伽马射线暴GRB170817A证实了中子星合并的假设，并首次提供了这些合并与短伽马射线暴之间联系的直接证据。随后在同一地点通过电磁光谱确定的瞬变对应物进一步支持了将这一事件解释为中子星合并的解释。这一史无前例的引力和电磁联合观测提供了对天体物理学、致密物质、引力和宇宙学的洞察。
On August 17, 2017 at 12:41:04 UTC the Advanced LIGO and Advanced Virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. The signal, GW170817, was detected with a combined signal-to-noise ratio of 32.4 and a false-alarm-rate estimate of less than one per 8.0 x 10(4) years. We infer the component masses of the binary to be between 0.86 and 2.26 M-circle dot, in agreement with masses of known neutron stars. Restricting the component spins to the range inferred in binary neutron stars, we find the component masses to be in the range 1.17-1.60 M-circle dot, with the total mass of the system 2.74(-0.01)(+0.04) M-circle dot. The source was localized within a sky region of 28 deg(2) (90% probability) and had a luminosity distance of 40(-14)(+8) Mpc, the closest and most precisely localized gravitational-wave signal yet. The association with the gamma-ray burst GRB 170817A, detected by Fermi-GBM 1.7 s after the coalescence, corroborates the hypothesis of a neutron star merger and provides the first direct evidence of a link between these mergers and short gamma-ray bursts. Subsequent identification of transient counterparts across the electromagnetic spectrum in the same location further supports the interpretation of this event as a neutron star merger. This unprecedented joint gravitational and electromagnetic observation provides insight into astrophysics, dense matter, gravitation, and cosmology.