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Gravitational waves finally prove Stephen Hawking's black hole theorem
An exceptionally loud collision between two black holes has been detected by the LIGO gravitational wave observatory, enabling physicists to test a theorem postulated by Stephen Hawking in 1971
When black holes collide, they produce gravitational waves with overtones like the ringing of a bell, says Laura Nuttall at the University of Portsmouth, UK, a member of the LVK team. Upgrades to LIGO and other planned observatories due to come online in the future will bring even greater sensitivity and allow us to delve deeper into the physics of black holes, says Ian Harry, also at the University of Portsmouth and part of the LVK team. The latest data from LVK also enabled scientists to confirm mathematician Roy Kerr’s equations from the 1960s which predicted that black holes can be characterised by just two metrics: their mass and their spin.
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