Physics at Virginia

"Binary-black-hole systems in general relativity"

Arwa Elhashash , University of Virginia - Department of Physics
[Host: Prof. David Nichols]

Studying binary-black-hole systems has long been of great interest in general relativity, and is even more so after the first observed event in 2015 discovered by LIGO.
We can study such systems by considering them to be isolated in an empty space that approaches flatness at infinity. Any changes in the spacetime can be quantified using the changes in charges conjugate to the asymptotic symmetries of the spacetime. In this talk, I will first discuss some of these charges, focusing on the angular momentum and the discrepancies in its definition in several different formalisms. Then, I will discuss a lasting effect called the gravitational-wave memory and an ongoing effort of developing waveform models of this effect for nonspinning binary-black-hole mergers.

Gravity Seminar
Monday, April 4, 2022
1:30 PM
Physics, Room 313

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