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Center for Astrophysics Research and Technologies Seminar Series Information


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Testing the No-Hair Theorem and the Area Theorem with LIGO

Friday November 12, 2021
4:00 pm

 Presenter:  Saul Teukolsky, Hans A. Bethe Professor of Physics at Cornell University
 Series:  Physics and Astronomy Colloquium
 Abstract:  One of the key results of general relativity is that an astrophysical black hole in equilibrium is uniquely described by just two parameters, its mass and spin. This is called the No-Hair Theorem, a result that is not true in alternative theories of gravity. For many years, people have speculated about testing the theorem using gravitational waves from merging black holes. For a long time, the consensus has been that this test will require the sensitivity of next-generation detectors. I will show that this consensus is wrong for a surprising reason, and report a test with data from GW150914, the first LIGO gravitational wave detection. An extension of the test confirms Hawking's Area Theorem at the 97% limit.
 Web Site:    https:/ / youtu.be/ b5QItBxVSCM
 Host:  Kevin Cahill
 Location:  Via Zoom. Please take the Satisfaction Survey

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