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Massive, Spinning Black Holes Could Be The Result Of & # 39; Pac-Man-Like & # 39; Mergers



  Accretion Disk surrounding the Supermassive Black Hole

This is a simulation of an accretion disk surrounding a supermassive black hole. Credit: Scott C. Noble

Scientists have reported that gravitational waves out of 10 black holes merge to this day, but they are still trying to explain the origin of these fusion. The biggest detriment to date has been that it does not seem to destroy previous models because it has a higher rotation and mass than the incidence range imagined. A team of researchers, including Rochester Institute of Technology Assistant Professor Richard O'Shaughnessy, created simulations that could explain how the integration happened.

In a new paper published in the Physical Review Letters published on November 1, 2019, researchers suggest that such a large merger could occur just outside the powerful black hole in the middle of active galactic nuclei. Gases, stars, dust and black holes are caught in a region surrounding supermassive black holes known as the accretion disk. Researchers suggest that as black holes circulate on the accretion disk, they eventually collide and join to form a larger black hole, which continues to spread smaller black holes, becoming larger in what is called that O 'Shaughnessy called "Pac-Man-like" behavior.

"This is a wonderful prospect for those of us working in this field," said O & # 39; Shaughnessy, a member of RIT & # 39; s Center for Computational Relativity and Gravitation (CCRG). "It offers a natural way to illuminate high-mass, high-rotation binary black hole mergers and to produce binaries in parts of the parameter space without damaging other models. way to get some kind of black hole in other other channels of development. ”

Like the hope LIGO and the Virgo collaboration to look for gravitational waves , O & # 39; Shaughnessy and his fellow researchers hope to find signatures of large, rotating black holes that will help to confirm their models. If their assumptions are correct, they will help us understand how the cosmic web of galaxies assembles.

"This can be a unique way of examining the physics around supermassive black holes in a way that cannot be tested in any other par. aan, "says O & # 39; Shaughnessy. "It offers a unique perspective on how the centers of galaxies grow, which of course is important in understanding how galaxies as a whole grow, explaining most of the structure in the universe."

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Reference: "Hierarchical Black Hole Mergers in Active Galactic Nuclei
Y. Yang, I. Bartos, V. Gayathri, K. S. Ford, Z. Haiman, S. Klimenko, B. Kocsis, S. Márka, Z. Márka, B. McKernan, and R. O & # 39; Shaughnessy
Phys. Rev. Lett 123, 181101 – Published November 2019

The RIT & # 39; s CCRG is there is a large and active group of 18 postdoctoral faculty, students and researchers involved in the LIGO Scientific Collaboration.


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