A dance of death is taking place at the heart of a galaxy in the distant Universe.
are locked in an orbit so tight that they will collide with each other and form one much larger black hole in the relatively short time of just 10,000 years.That equates to an orbital distance of just 0.03 light-years, around 50 times the average distance between the Sun and Pluto. Yet, so fast are they moving that it takes just two Earth years for the two objects to complete a binary orbit, compared to Pluto's 248 years.
Binary black hole mergers are one way this growth can occur. Finding binary supermassive black holes will help us understand if it's a common pathway for this growth, and that could lead to more accurate modeling.The object in question is a quasar, named PKS 2131-021.
The trail seemed to end when only two more peaks were found in archival data, one in 2005, and another in 1981. But then, in 2021, the project piqued the interest of astronomer Sandra O'Neill of Caltech. She and a team of researchers revisited data archives to see how far back in time they could trace this strange pattern.They hit paydirt. In data from the Haystack Observatory made between 1975 and 1983, more of the pattern emerged, consistent with the timing of the rest of the observations.
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