Young@INFN 2025: 2nd event - "Gravitational waves"

by Romeo Felice Rosato

Thursday 10 Apr 2025, 16:30 → 18:30 Europe/Rome

Sala Direzione INFN (Dipartimento di Fisica - Edi. Marconi)

2nd speaker: Romeo Rosato Felice

Title: "Greybody factors as robust gravitational observables"

Abstract: "The quasinormal mode spectrum plays a crucial role in modeling post-merger ringdown signals in binary coalescences, encompassing both black holes and ultracompact horizonless objects. However, quasinormal modes suffer of many ambiguities. Motivated by a recently discovered connection between greybody factors and post-merger black hole signals, we study the robustness of greybody factors as gravitational observables for ultracompact horizonless objects, furnishing a complementary approach to quasinormal modes, unveiling non-trivial properties of those hypothetical objects."