查看“︁GW170814”︁的源代码

{{Infobox astronomical event|image=GW170814_signal.png|ra={{RA|3|11}}|dec={{DEC|-44|57}}|energy=≈ {{val|3|ul=solar mass}} × ''c''<sup>2</sup>}}'''GW170814''' 是[[激光干涉引力波天文台]]（LIGO）和[[室女座干涉儀|室女座干涉仪（VIRGO）]]于2017年8月14日联合探测到的一次双黑洞并合[[重力波 (相對論)|引力波]]事件。<ref name="NYT-20170927">{{cite news|url=https://www.nytimes.com/2017/09/27/science/black-holes-collision-ligo-virgo.html|title=New Gravitational Wave Detection From Colliding Black Holes|last=Overbye|first=Dennis|date=27 September 2017|work=[[The New York Times]]|authorlink=Dennis Overbye|accessdate=28 September 2017|archive-date=2021-01-14|archive-url=https://web.archive.org/web/20210114151548/https://www.nytimes.com/2017/09/27/science/black-holes-collision-ligo-virgo.html|dead-url=no}}</ref> 2017年9月27日，LIGO和VIRGO公布了观察信号，GW170814成为继[[GW150914]], [[GW151226]]和[[GW170104]]之后第四起认证的引力波事件。 它也是第一起LIGO和VIRGO联合探测到的双黑洞并合事件。<ref name="PRL-20171006">{{cite journal|title=GW170814: A three-detector observation of gravitational waves from a binary black hole coalescence|url=https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.141101|first1=Benjamin P.|journal=[[Phys. Rev. Lett.]]|issue=14|doi=10.1103/PhysRevLett.119.141101|year=2017|volume=119|pages=141101|arxiv=1709.09660|bibcode=|pmid=|collaboration=LIGO Scientific Collaboration and Virgo Collaboration|last1=Abbott|lay-summary=http://ligo.org/detections/GW170814/press-release/pr-english.pdf|access-date=2018-01-02|archive-date=2020-07-30|archive-url=https://web.archive.org/web/20200730074731/https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.141101|dead-url=no}}</ref>

== 事件探测 ==
[[File:GW170814.png|左|缩略图|250x250像素|GW170814的估计位置。]]
该信号于2017年8月14日10:30:43[[协调世界时|UTC]]被探测到。利文斯顿的探测器最先接收到信号，汉福德探测器和室女座干涉仪分别于8毫秒和14毫秒后接收到信号。三个探测器给出了对源的位置的非常精确的估计，90%置信区域的大小仅为60 [[平方度|°<sup>2</sup>]]，比之前的探测精确20倍。<ref>[https://www.youtube.com/watch?v=xR6d8V5oh0o Update on Gravitational Wave Science from the LIGO-Virgo Scientific Collaborations] {{Wayback|url=https://www.youtube.com/watch?v=xR6d8V5oh0o |date=20201119092204 }} (Video of the press conference), retrieved 27 September 2017</ref>

== 天体物理学起源 ==
分析表明，引力波信号来源于[[雙黑洞|双黑洞]]（BBH）的绕转与并合，两个黑洞的质量分别为<math>30.5^{+5.7}_{-3.0}\,M_\odot</math>和<<math>25.3^{+2.8}_{-4.2}\,M_\odot</math>
，与地球的[[光度距離|距离]]约为<math>540^{+130}_{-210}</math>Mpc（<math>1.8^{+0.4}_{-0.7}</math>百万光年）。<ref name="Lincoln">[http://www.cnn.com/2017/10/01/opinions/gravitational-waves-black-holes-opinion-lincoln/index.html New detectors reveal a cosmic （）calamity] {{Wayback|url=http://www.cnn.com/2017/10/01/opinions/gravitational-waves-black-holes-opinion-lincoln/index.html |date=20191217071355 }}. Don Lincoln, CNN News, 1 October 2017</ref> 并合形成的[[黑洞|黑洞约为]]<math>53.2^{+3.2}_{-2.5}</math>个太阳质量，约<math>2.7^{+0.4}_{-0.3}</math>个太阳质量以[[引力势能|引力波辐射]]的形式传播出去。GW170814的峰值[[光度]]为<math>3.7\times 10^{49}</math>W。

== 对广义相对论的影响 ==
[[廣義相對論|广义相对论]]预测引力波具有类[[張量|张]]量（spin-2）的[[偏振]]。 三个探测器的探测给出了张量偏振的有力的实验证据。<ref>{{Cite news|url=https://www.nature.com/news/european-detector-spots-its-first-gravitational-wave-1.22690?WT.mc_id=TWT_NatureNews&sf117118315=1|title=European detector spots its first gravitational wave|date=27 September 2017|work=Elizabeth Gibney & Davide Castelvecchi|publisher=[[Nature (journal)|Nature]]|accessdate=27 September 2017|archive-date=2020-07-12|archive-url=https://web.archive.org/web/20200712072050/https://www.nature.com/news/european-detector-spots-its-first-gravitational-wave-1.22690?WT.mc_id=TWT_NatureNews&sf117118315=1|dead-url=no}}</ref>

== 参见 ==
* [[引力波天文学|重力波天文学]]
* 引力波观测列表

== 参考文献 ==
{{reflist}}

== 外部链接 ==
* [http://www.ligo.org/detections/images/GW170814-FactSheet.pdf GW170814–FactSheet] {{Wayback|url=http://www.ligo.org/detections/images/GW170814-FactSheet.pdf |date=20191223232618 }} –LIGO
* {{YouTube|id=BakMSko9VA0|title=GW170814 – Gravitational-waves observed by Virgo & LIGO}}
{{引力波}}
{{2017 in space}}
[[Category:2017年科學]]
[[Category:2017年8月]]
[[Category:聯星]]
[[Category:恆星黑洞]]
[[Category:引力波天文学]]