Séminaire / Seminar GReCO |
| « Subleading structure of asymptotically-flat spacetimes » |
|
Marc Geiller |
| Asymptotic symmetries provide a powerful insight into the structure of gravitational radiation and memory effects in asymptotically flat spacetimes. In this talk I will review the recent developments aiming at enlarging the available asymptotic symmetries. This will be explained via a dictionary between the Bondi-Sachs formalism and the Newman-Penrose formalism which enables to study the fine subleading structure of asymptotically-flat spacetimes and argue for the emergence of hidden symmetry structures. I will also discuss potential generalizations to other types of boundary conditions beyond standard asymptotically-flat spacetimes, including e.g. violations of peeling, a cosmological constant, and twisting geometries. |
|
lundi 23 mars 2026 - 11:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |