Black holes. They used to be theoretical, up until the first one was found and confirmed back in the late 20th century. Now, astronomers find them all over the place. We even have direct radio images of two black holes: one in M87 and Sagittarius A
"While that sounds fairly simple, figuring those values out for most black holes has proved to be incredibly difficult."Measuring spin is a real challenge. To learn more about monster black holes, Sisk-Reynes and collaborators used Chandra X-ray Observatory data.
Why X-rays? A spinning black hole drags space around with it and allows matter to orbit closer to it than is possible for a non-spinning one. X-ray data shows how fast the black hole spins. astronomer Christopher Reynolds . He is co-author of the paper reporting the results of the Chandra measurements."The million-dollar question is: why?"The history of H1821+643 could hold the key to understanding its slower spin rate, according to co-author James Matthews .
It's well known that galaxy collisions build up larger galaxies over time, and so those same activitiesIt's also possible that this black hole had its outer disk disrupted in a collision, which sent gas out in random directions during the event.
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