GW 190412 was a gravitational wave (GW) signal observed by the LIGO and Virgo detectors on 12 April 2019. In April 2020, it was announced as the first time a collision of a pair of very differently sized black holes has been detected. As a result of this asymmetry, the signal included two measurable harmonics with frequencies approximately a factor 1.5 (a perfect fifth) apart.
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- GW190412 (fr)
- GW190412 (zh)
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| - 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。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。因此，信號顯示出兩個突出的頻率，大約相差1.5個數量級。 碰撞發生在24億光年之外：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。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。 (zh)
- GW 190412 was a gravitational wave (GW) signal observed by the LIGO and Virgo detectors on 12 April 2019. In April 2020, it was announced as the first time a collision of a pair of very differently sized black holes has been detected. As a result of this asymmetry, the signal included two measurable harmonics with frequencies approximately a factor 1.5 (a perfect fifth) apart. (en)
- GW190412, initialement S190412m, est le nom du signal attribué à une observation directe d’ondes gravitationnelles annoncée le 17 avril 2020. La détection a été faite le 12 avril 2019 à 5 h 30 min 44 s UTC sur les deux sites américains jumeaux LIGO construits en Louisiane et dans l’État de Washington et par l'observatoire européen Virgo localisé près de Pise. (fr)
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| - GW 190412 was a gravitational wave (GW) signal observed by the LIGO and Virgo detectors on 12 April 2019. In April 2020, it was announced as the first time a collision of a pair of very differently sized black holes has been detected. As a result of this asymmetry, the signal included two measurable harmonics with frequencies approximately a factor 1.5 (a perfect fifth) apart. The collision took place 2.4 billion light-years away. The heavier of the black holes had a mass of 29.7 solar masses, and the lighter one around 8.4 solar masses. The difference in mass meant that the secondary harmonic in the signal was strong enough to be detected, allowing researchers to perform a test of general relativity and determine that the larger black hole was spinning. (en)
- GW190412, initialement S190412m, est le nom du signal attribué à une observation directe d’ondes gravitationnelles annoncée le 17 avril 2020. La détection a été faite le 12 avril 2019 à 5 h 30 min 44 s UTC sur les deux sites américains jumeaux LIGO construits en Louisiane et dans l’État de Washington et par l'observatoire européen Virgo localisé près de Pise. Le signal est issu de la fusion d'un trou noir binaire. Les deux trous noirs de masses respectives d'environ 30 et 8 masses solaires ont fusionné en un trou noir d'environ 37 masses solaires. L'événement constitue la première fusion de trous noirs de masses asymétriques observée. (fr)
- 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。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。因此，信號顯示出兩個突出的頻率，大約相差1.5個數量級。 碰撞發生在24億光年之外：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。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。 (zh)
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