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SUMMARY:Testing general relativity with the ringdown of gravitational-wave
  observations
DTSTART:20251204T143000Z
DTEND:20251204T160000Z
DTSTAMP:20260725T123430Z
UID:91562d03-0e6d-4cb3-839f-c8c8b04cad1e
SEQUENCE:2
CREATED:20251202T155009Z
DESCRIPTION:Gravitational waves provide a unique opportunity to test gravi
 ty and probe the nature of astrophysical sources. With hundreds of binary 
 coalescences detected by LIGO and Virgo\, general relativity continues to 
 stand as a successful theory of gravity. The loudest event to date\, GW250
 114\, offered a direct probe of the remnant’s Kerr nature by constrainin
 g multiple ringdown modes. In contrast\, the second loudest signal\, GW230
 814\, exhibits a ringdown damping time shorter than predicted by general r
 elativity. Simulations indicate that such deviations can arise from missin
 g physics in waveform models or noise artefacts\, suggesting no evidence f
 or a breakdown of general relativity. In this talk\, I will present analys
 es of recently observed gravitational-wave signals and discuss the prospec
 ts for testing fundamental physics with next-generation detectors.
LAST-MODIFIED:20251202T155017Z
LOCATION:DF Seminar Room (2-8.3)\, 2nd floor of Physics Building
URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/testing-general-relativity
 -with-the-ringdown-of-gravitational-wave-observations/
X-ALT-DESC;FMTTYPE=text/html:<p data-block-key="sg52j">Gravitational waves
  provide a unique opportunity to test gravity and probe the nature of astr
 ophysical sources. With hundreds of binary coalescences detected by LIGO a
 nd Virgo\, general relativity continues to stand as a successful theory of
  gravity.<br/><br/> The loudest event to date\, GW250114\, offered a direc
 t probe of the remnant’s Kerr nature by constraining multiple ringdown m
 odes. In contrast\, the second loudest signal\, GW230814\, exhibits a ring
 down damping time shorter than predicted by general relativity.<br/><br/> 
 Simulations indicate that such deviations can arise from missing physics i
 n waveform models or noise artefacts\, suggesting no evidence for a breakd
 own of general relativity. In this talk\, I will present analyses of recen
 tly observed gravitational-wave signals and discuss the prospects for test
 ing fundamental physics with next-generation detectors.</p>
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