Speaker
E. Şeyma Kutluk
(Scuola Normale Superiore)
Description
We write a closed form expression for the metric perturbation around de Sitter that describes gravitational radiation from a compact and slowly varying source, in terms of a consistent multipolar expansion at quadrupolar order. We show that the corresponding displacement memory effect with both the even and odd parities is at a higher order in the radial expansion compared to their flat counter-parts. Using the form of the metric perturbation we obtained, we write expressions for SO(1,4) charges at future infinity that reduce to the correct expressions in the flat limit, which also includes a definition of mass that strictly decreases in the presence of gravitational radiation.
Authors
E. Şeyma Kutluk
(Scuola Normale Superiore)
Geoffrey Compère
(Universite Libre de Bruxelles)
Sk Jahanur Hoque
(Universite Libre de Bruxelles)
