编辑“︁GW190412”︁

'''GW190412'''是由[[雷射干涉引力波天文台]]（LIGO）和[[室女座干涉儀]]探測器（Virgo）觀測到的一個[[引力波]]（GW，Gravitational wave）信號<ref name="S190412m">{{cite web |title=Superevent info - S190412m |url=https://gracedb.ligo.org/superevents/S190412m/view/ |publisher=LIGO |accessdate=2019-04-12 |archive-date=2020-11-07 |archive-url=https://web.archive.org/web/20201107230515/https://gracedb.ligo.org/superevents/S190412m/view/ |dead-url=no }}</ref><ref name="arxiv2004.08342">{{cite arxiv |title=GW190412: Observation of a Binary-Black-Hole Coalescence with Asymmetric Masses |date=2020-04-17 |eprint=2004.08342 |author1=The LIGO Scientific Collaboration |author2=the Virgo Collaboration |last3=Abbott |first3=R. |last4=Abbott |first4=T. D. |last5=Abraham |first5=S. |last6=Acernese |first6=F. |last7=Ackley |first7=K. |last8=Adams |first8=C. |last9=Adhikari |first9=R. X. |last10=Adya |first10=V. B. |last11=Affeldt |first11=C. |last12=Agathos |first12=M. |last13=Agatsuma |first13=K. |last14=Aggarwal |first14=N. |last15=Aguiar |first15=O. D. |last16=Aich |first16=A. |last17=Aiello |first17=L. |last18=Ain |first18=A. |last19=Ajith |first19=P. |last20=Akcay |first20=S. |last21=Allen |first21=G. |last22=Allocca |first22=A. |last23=Altin |first23=P. A. |last24=Amato |first24=A. |last25=Anand |first25=S. |last26=Ananyeva |first26=A. |last27=Anderson |first27=S. B. |last28=Anderson |first28=W. G. |last29=Angelova |first29=S. V. |last30=Ansoldi |first30=S. |class=astro-ph.HE |displayauthors=29 }}</ref>。在2000年4月，它被宣布為首次檢測到的一對質量大小懸殊的[[黑洞]]碰撞<ref name="Starr">{{cite news |last1=Starr |first1=Michelle |title=Astronomers Find First-Ever Collision of Black Holes With a Strange Mass Discrepancy |url=https://www.sciencealert.com/this-black-hole-collision-is-the-first-with-wildly-mismatched-masses |work=ScienceAlert |language=en-gb |accessdate=2020-09-04 |archive-date=2020-12-01 |archive-url=https://web.archive.org/web/20201201184600/https://www.sciencealert.com/this-black-hole-collision-is-the-first-with-wildly-mismatched-masses |dead-url=no }}</ref>。因此，信號顯示出兩個突出的頻率，大約相差1.5個數量級<ref name="Berry">{{cite web |last1=Berry |first1=Christopher |title=GW190412—A new flavour of binary black hole |url=https://cplberry.com/2020/04/18/gw190412/ |website=Christopher Berry |language=en |date=2020-04-18 |accessdate=2020-09-04 |archive-date=2020-12-31 |archive-url=https://web.archive.org/web/20201231223447/https://cplberry.com/2020/04/18/gw190412/ |dead-url=no }}</ref>。

碰撞發生在24億[[光年]]之外<ref name="Starr" />：較重的黑洞質量為29.7太陽質量，較輕的僅有8.4太陽質量<ref name="Starr" />。質量的差異導致引力波具有兩個不同的頻率，使研究人員能夠對[[廣義相對論]]進行測試，並確定質量較大的黑洞在旋轉<ref name="Starr" />。

== 相關條目 ==
* [[引力波天文學]]
* {{link-en|引力波觀測清單|List of gravitational wave observations}}

== 參考資料 ==
{{reflist}}

== 外部連結 ==
* {{youtube|55H0ABK7ly0|GW190412: Binary Black Hole Merger (with spin)}}

{{引力波}}
{{2019年太空活動}}
{{Portal bar|天文學|物理學}}

[[Category:黑洞]]
[[Category:引力波]]