Astrophysicists find no 'hair' on black holes

14 days ago

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Astrophysicists test Einstein's 'no-hair' conjecture for black holes using gravitational wave data.
Black holes are described by mass and spin in general relativity, with no other distinguishing features ('no hair').
Gravitational wave observations from black hole mergers support Einstein's theory, showing no deviations beyond 40 km from the event horizon.
The 'no-hair' theorem conflicts with quantum mechanics, leading to the information paradox about lost information in black holes.
Proposed solutions to the paradox include quantum 'hair' like firewalls, fuzzballs, gravastars, and regular black holes.
Current searches for quantum hair effects, such as gravitational wave echoes, have not found evidence yet.
Future detectors like the Einstein Telescope aim to test general relativity with unprecedented precision, possibly revealing new physics.

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