When supermassive black holes barrel toward collision, they can reach speeds of up to 1/10th the speed of light, new research suggests.
or elliptical, black hole trajectory. Previously, scientists thought black holes approaching each other would spiral toward each other in near-circular orbits, Lousto said. The discovery of elliptical orbits broadened the range of possible collision events, and prompted them to look for extreme collision scenarios."What we wanted to do is kind of push the limits of these collisions," said Lousto.
Lousto and Healy looked at how adjusting four parameters affected the outcome of gravitational engagement between two black holes: the initial momenta of the black holes, the separation between them at the point of closest approach, the orientation of any rotation the black hole might have around its own axis, and the magnitude of that rotation.
By running 1,381 simulations — each of which took two to three weeks — the researchers found a peak in the possible recoil velocities for black holes with opposite spins grazing past each other. While black holes give out gravitational radiation in all directions, the opposing spins distort this radiation, creating a thrust that adds to the recoil velocity., Associate Professor in the Physics Department at the University of Florida, told Live Science via email. .
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