论文标题
中子星合并的第一个多通讯观察
First Multimessenger Observations of a Neutron Star Merger
论文作者
论文摘要
我们描述了具有引力波和光的同一天体对象的第一个观察结果。 * GW170817是与重力波的中子星合并的首次检测。 *合并后，检测$γ$ -rays（GRB 170817a）1.7 s的空间巧合弱突发构成引力波源的第一个电磁检测，并建立了至少一些宇宙短伽玛射线爆发（SGRBS）和Bariare Setmon Star Star Mergers的连接。 *与该事件相关的快速发展的光学和近红外瞬态（在2017GFO）可以解释为是由于$ \ sim $ \ sim $ 0.05 m $ _ {\ odot} $富含R-process元素的材料的$ _ {\ odot} $，最终将二进制中性星星合并建立至少将二进制中的星星合并为r rcorcess nutprocess nutprocess nutprocessesess。 *无线电和X射线观测显示，合并后的$ \ sim $ 160 d达到顶峰。 Combined with the apparent superluminal motion of the associated VLBI source, these observations show that the merger produced a relativistic structured jet whose core was oriented $\approx$ 20 deg from the line of sight and with properties similar to SGRBs.射流结构可能是由于与合并喷射的相互作用而引起的。 *可以将电磁和重力波信息组合起来，以对宇宙的膨胀率和密集核物质状态的方程产生约束。这些多中音的努力将是未来工作的主要重点。
We describe the first observations of the same celestial object with gravitational waves and light. * GW170817 was the first detection of a neutron star merger with gravitational waves. * The detection of a spatially coincident weak burst of $γ$-rays (GRB 170817A) 1.7 s after the merger constituted the first electromagnetic detection of a gravitational wave source and established a connection between at least some cosmic short gamma-ray bursts (SGRBs) and binary neutron star mergers. * A fast-evolving optical and near-infrared transient (AT 2017gfo) associated with the event can be interpreted as resulting from the ejection of $\sim$0.05 M$_{\odot}$ of material enriched in r-process elements, finally establishing binary neutron star mergers as at least one source of r-process nucleosynthesis. * Radio and X-ray observations revealed a long-rising source that peaked $\sim$160 d after the merger. Combined with the apparent superluminal motion of the associated VLBI source, these observations show that the merger produced a relativistic structured jet whose core was oriented $\approx$ 20 deg from the line of sight and with properties similar to SGRBs. The jet structure likely results from the jet interaction with the merger ejecta. * The electromagnetic and gravitational wave information can be combined to produce constraints on the expansion rate of the universe and the equation of state of dense nuclear matter. These multimessenger endeavors will be a major emphasis for future work.
