摘要
2017年8月17日,激光干涉引力波天文台(LIGO)首次探测到来自双中子星合并的引力波GW170817.伴随GW170817的短伽玛射线暴与千新星也分别在1.74 s后和10.9 h后被伽玛射线卫星和光学望远镜探测到.对这些电磁对应体的观测与研究首次证实双中子星并合会产生大量重元素并形成千新星.通过相关理论与观测的比较,人们对于双中子星并合的中心引擎、短伽玛暴喷流的特性以及并合产生的抛射物性质等一系列重要的天体物理学问题进行了空前深入的研究.本文介绍伴随GW170817的各类电磁波对应体的性质,并探讨这些电磁波对应体的物理起源.
The gravitational wave （GW） signal from a binary neutron star （NS） merger was detected by the LIGO/virgo detec- tors on August 17th 2017 for the first time. A short gamma-ray burst （GRB） and a kilonova were detected 1.74 s and 10.9 h after the GW signal, respectively. These detections confirm the hypothesis that at least some short gamma-ray bursts （GRB） originate from binary neutron star mergers. Furthermore, it is clear that r-process nucleosynthesis should occur in NS-NS mergers and then power a kilonova. Observations on its multi-wavelength counterparts （including the prompt gamma-ray emission, kilonova, and afterglow） make us be able to investigate their physical origins as a whole for the first time. Comparisons between the theories and observations would greatly help answer questions such as the binary NS merger remnant, the characteristics of the GRB jet, and the characteristics of the ejecta. This paper summarizes these electromagnetic counterparts to GW170817 from the NS-NS merger and provides theoretical interpretations for them.
作者
耿金军
肖笛
王善钦
戴子高
GENG JinJun;XIAO Di;WANG ShanQin;DAI ZiGao(School of Astronomy and Space Science, Nanjing University, Nanjing 210046, China;Key Laboratory of Modern Astronomy and Astrophysics （Nanjing University）, Ministry of Education, Nanjing 210046, China;Department of Astronomy, University of California, Berkeley 94720-3411, USA)
出处
《中国科学：物理学、力学、天文学》
CSCD
北大核心
2018年第7期2-21,共20页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家重点基础研究发展计划(编号：2014CB845800)、国家自然科学基金(编号：11573014)、博士后创新人才支持计划(编号：BX201700115)和博士后面上基金(编号：2017M620199)资助
关键词
伽玛射线暴
黑洞
中子星
辐射机制
引力波
gamma-ray bursts
black holes
neutron stars
radiation mechanisms
gravitational waves
作者简介
联系人，耿金军，E-mail：gengjinjun@nju．edu．cn;联系人，戴子高，E-mail：dzg@nju．edu.cn
