XMM-Newton discovers a new class of black holes
Wednesday, July 1, 2009 - 12:42
in Astronomy & Space
Astronomers using ESA’s XMM-Newton X-ray observatory have discovered a black hole weighing more than 500 solar masses, a missing link between lighter stellar-mass and heavier supermassive black holes, in a distant galaxy. This discovery is the best detection to date of a new class that has long been searched for: intermediate mass black holes.