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SUMMARY:Precision Parameter Estimation\, Strong Field Tests of GR\, and Sp
 in Inference for future detections
DTSTART:20260703T120000Z
DTEND:20260703T140000Z
DTSTAMP:20260702T055000Z
UID:indico-event-530@indico.tpi.uni-jena.de
DESCRIPTION:Speakers: Vaishak Prasad\n\nAs the sensitivity of the LIGO–V
 irgo–KAGRA detector network improves\, gravitational-wave observations a
 re moving from detections to precision measurements. We can now observe co
 mpact-binary mergers at larger distances\, probe earlier cosmic epochs\, a
 nd study exceptionally loudevents in unprecedented detail. These observati
 ons enable sharper tests of general relativity\, more informative measurem
 ents of compact-object populations\, and increasingly stringent requiremen
 ts on the waveform models that connect strong-field source dynamics to det
 ector data. In this talk\, I will address three connected aspects of this 
 precision regime: accelerated time-domain analysis\, consistency tests of 
 general relativity\, and binary-black-hole spin inference.I will first pre
 sent ‘tdanalysis‘\, an accelerated time domain analysis pipeline [1]\,
  and discuss the various hardware\, software\, and algorithmic optimizatio
 ns that enable exact Gaussian likelihood evaluations at O(N logN ) complex
 ity. Then\, I present the multi-segment consistency test of GR [2]\,a gene
 ralization of the Inspiral-Merger-Ringdown consistency test [3]. Finally\,
  I present evidence from recent research revisiting the spin-priors [4]\, 
 that challenges the GWTC-4.0 result that the spin-magnitude posterior peak
 s lie at very small values χ ≃ 0.01–0.23 at 90% CI\, for roughly 83% 
 of observed black holes [4\, 5].Time permitting\, I will conclude by discu
 ssing indications that binary-black-hole mergers may exhibit a thermodynam
 ic character\, as suggested by the maximum-entropy conjecture for black-ho
 le mergers [6].\n\nhttps://indico.tpi.uni-jena.de/event/530/
LOCATION:Abbenaum /1 - SR 102 (TPI\, FSU Jena)
URL:https://indico.tpi.uni-jena.de/event/530/
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