Gravitational Waves and Gamma-Rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
Gravitational Waves and Gamma-Rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
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DOI：
10.3847/2041-8213/aa920c
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发表时间：
2017-10-20
影响因子：
7.9
通讯作者：
Ubertini, P.
中科院分区：
文献类型：
--
作者：
Abbott, B. P.;Abbott, R.;Ubertini, P.
2017年8月17日，高级LIGO和处女座探测器以及伽马射线暴（GRB）观测到引力波事件GW170817。170817A是由费米伽玛射线暴监测器和国际伽玛射线天体物理实验室光谱仪的反巧合屏蔽独立观测到的。伽玛暴近同时时空观测的概率。170817A和GW170817偶然发生的概率为5.0 × 10（-8）。因此，我们确认双中子星合并是短伽马射线暴的祖先。GW170817与GRB的关联。170817A为基础物理学和短伽马射线暴的起源提供了新的见解。我们使用观测到的GRB之间的时间延迟（+ 1.74 +/- 0.05）s。170817A和GW170817的研究：(i)将重力与光速的差限制在-3 x 10（-15）和+ 7 x 10（-16）倍光速之间，（ii）对违反洛伦兹不变性提出了新的界限，（iii）通过约束引力和电磁辐射之间的夏皮罗延迟，提出了等效原理的新检验。我们还使用时间延迟来限制发射伽马射线的区域的大小和总体洛伦兹因子。伽马射线爆发。170817A是已知距离最近的短伽马射线暴，但能量比其他测量到红移的爆发低2到6个数量级。新一代的伽玛射线探测器，以及现有探测器的亚阈值搜索，对于在更远的距离探测类似的短爆发至关重要。最后，我们预测费米伽马射线暴监测器与高级LIGO和Virgo探测器在2018-2019年观测期间的联合探测率为每年0.1-1.4，设计灵敏度为每年0.3-1.7。
On 2017 August 17, the gravitational-wave event GW170817 was observed by the Advanced LIGO and Virgo detectors, and the gamma-ray burst (GRB) GRB. 170817A was observed independently by the Fermi Gamma-ray Burst Monitor, and the Anti-Coincidence Shield for the Spectrometer for the International Gamma-Ray Astrophysics Laboratory. The probability of the near-simultaneous temporal and spatial observation of GRB. 170817A and GW170817 occurring by chance is 5.0 x 10(-8). We therefore confirm binary neutron star mergers as a progenitor of short GRBs. The association of GW170817 and GRB. 170817A provides new insight into fundamental physics and the origin of short GRBs. We use the observed time delay of (+ 1.74 +/- 0.05) s between GRB. 170817A and GW170817 to: (i) constrain the difference between the speed of gravity and the speed of light to be between -3 x 10(-15) and + 7 x 10(-16) times the speed of light, (ii) place new bounds on the violation of Lorentz invariance, (iii) present a new test of the equivalence principle by constraining the Shapiro delay between gravitational and electromagnetic radiation. We also use the time delay to constrain the size and bulk Lorentz factor of the region emitting the gamma-rays. GRB. 170817A is the closest short GRB with a known distance, but is between 2 and 6 orders of magnitude less energetic than other bursts with measured redshift. A new generation of gamma-ray detectors, and subthreshold searches in existing detectors, will be essential to detect similar short bursts at greater distances. Finally, we predict a joint detection rate for the Fermi Gamma-ray Burst Monitor and the Advanced LIGO and Virgo detectors of 0.1-1.4 per year during the 2018-2019 observing run and 0.3-1.7 per year at design sensitivity.