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SUMMARY:Symmetries in the gravitational physics of black holes
DTSTART:20260604T140000Z
DTEND:20260604T153000Z
DTSTAMP:20260502T040100Z
UID:indico-event-52031@agenda.infn.it
DESCRIPTION:Speakers: Valerio De Luca (Johns Hopkins University)\n\nThe dy
 namics of coalescing black hole binaries are deeply governed by underlying
  symmetry principles across all phases of their evolution. We explore how 
 symmetry arguments illuminate three key observables: tidal Love numbers\, 
 quasi-normal modes\, and gravitational memory. During the inspiral\, tidal
  Love numbers describe the conservative response of compact objects to ext
 ernal tidal fields. We revisit their vanishing for black holes in General 
 Relativity from a symmetry-based perspective\, examining the fragility of 
 this property when the symmetry structure is broken. In the ringdown\, qua
 si-normal modes encode the characteristic oscillations of perturbed black 
 holes. We discuss isospectrality between different parity sectors and trac
 e its origin to spacetime symmetries. Finally\, gravitational memory descr
 ibes the permanent offset in the gravitational wave strain arising from th
 e nonlinear nature of gravity. We explore its relation to Bondi-Metzner-Sa
 chs symmetries at future null infinity in synchronous coordinates and disc
 uss the associated soft theorems for scattering amplitudes and in-in corre
 lation functions.\n\nhttps://agenda.infn.it/event/52031/
LOCATION:Aula Conversi (Dipartimento di Fisica-Ed. Marconi)
URL:https://agenda.infn.it/event/52031/
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