Cornell University

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Cornell Department of Astronomy & Space Sciences Fall 2021 Colloquium Series. "Testing the No-Hair Theorem and the Area Theorem with LIGO"

Thursday, September 9, 2021 at 4:00pm to 5:00pm

Space Sciences Building, 105

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.

Dial-In Information

The colloquia are held every Thursday afternoon 4-5 pm. The public is welcome. To view via Zoom, please contact Monica Carpenter (mla20@cornell.edu) or Jason Jennings (jej34@cornell.edu) for the link.

 

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Event Type

Lecture

Departments

Astronomy

Website

https://astro.cornell.edu/events#coll...

Contact E-Mail

mla20@cornell.edu

Contact Name

Monica Carpenter

Contact Phone

6072553727

Speaker

Saul Teukolsky

Speaker Affiliation

Hans A. Bethe Professor of Physics, Cornell University

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