标题： GW170817：双中子星螺旋并合引力波的观测 显示英文标题

标题： GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral

摘要： 2017年8月17日12:41:04 UTC，高级LIGO和高级Virgo引力波探测器首次观测到了双中子星旋近事件。 该信号GW170817的联合信噪比为32.4，误报率估计小于每$8.0\times10^4$年一次。 我们推断双星系统的组分质量在0.86到2.26$M_\odot$之间，与已知中子星的质量一致。 将组分自旋限制在双中子星中推断的范围内，我们发现组分质量在1.17到1.60$M_\odot$之间，系统的总质量为$2.74^{+0.04}_{-0.01}\,M_\odot$。 该源在天空区域28 deg$^2$内定位（90%概率），其光度距离为$40^{+8}_{-14}$Mpc，这是迄今为止最近且定位最精确的引力波信号。 与费米-GBM在合并后1.7秒检测到的伽马射线暴GRB 170817A的关联，证实了中子星合并的假设，并提供了这些合并与短时伽马射线暴之间联系的第一个直接证据。 随后在相同位置的电磁波谱中识别出瞬变对应体，进一步支持了此次事件作为中子星合并的解释。 这一前所未有的引力波和电磁联合观测为天体物理学、致密物质、引力和宇宙学提供了见解。 显示英文摘要

摘要： 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 $8.0\times10^4$ years. We infer the component masses of the binary to be between 0.86 and 2.26 $M_\odot$, 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 to 1.60 $M_\odot$, with the total mass of the system $2.74^{+0.04}_{-0.01}\,M_\odot$. The source was localized within a sky region of 28 deg$^2$ (90% probability) and had a luminosity distance of $40^{+8}_{-14}$ 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.