"Three-Body" popularized the concept of "Three-Body". In fact, three-body galaxies are not very rare in the vast universe, but recently, scientists have found evidence of a "three-body black hole system" for the first time. In 2019, scientists captured a gravitational wave event, numberedGW190814, initially appeared to be an ordinary merger of two black holes, but the latest analysis found signs of additional acceleration, suggesting that there is a third black hole in the system.
The joint observation study of LIGO, Virgo, and KAGRA shows thatWhen two black holes rotate around each other and eventually merge, if they are simultaneously attracted by a third, more massive black hole, the overall motion of the entire system will exhibit a special acceleration effect.
After model comparison and analysis, scientists found that there is indeed a signal in the observation data that is highly consistent with this.
What is also interesting is that the black hole mass of the GW190814 system is very special.One of them is only 2.4 times the mass of the sun, almost at the dividing line between a black hole and a neutron star, and the other is 23 times the mass of the sun.
Such a huge disparity in mass ratio is generally not seen in binary black holes, and further adds evidence for the existence of a third black hole.
