Physics Seminar
Date: Thursday, 5 December 2024
Time: 11.00 AM
Venue: Lecture Hall 4
On the power radiated quadrupole formula in de Sitter
SK Jahanur Hoque
BITS-Pilani Hyderabad and ULB Brussels, Charles University Prague.
05-12-24

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Abstract

The first proposed power radiated quadrupolar formula for gravitational waves in de Sitter was derived by Ashtekar, Bonga, and Kesavan (ABK). We point out that a consistent quadrupolar truncation is needed to upgrade the ABK formula. We also compare our result to a recently obtained result of Bonga, Bunster, and Perez. We write the energy flux-balance law in two distinct ways, which allow standard flat limit and negative definite energy flux in de Sitter.