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SUMMARY:On the Relation Between Asymptotic Charges\, the Failure of Peelin
 g and Late-time Tails - Leonhard Kehrberger (DAMTP)
DTSTART:20220527T120000Z
DTEND:20220527T130000Z
UID:TALK173705@talks.cam.ac.uk
CONTACT:Prahar Mitra
DESCRIPTION:In this talk\, we show that the late-time tails of gravitation
 al radiation depend crucially on the conformal regularity of future null i
 nfinity $\\mathcal{I}^+$: The stronger the violation of peeling near $\\ma
 thcal{I}^+$\, the slower the decay at late times. This correspondence is m
 ade precise by introducing the modified Newman--Penrose charges\, which ar
 e conserved along $\\mathcal{I}^+$. By then considering a physical setup o
 f N infalling masses\, and by relating the structure of their gravitationa
 l radiation near the infinite past to that near $\\mathcal{I}^+$\, we show
  that the peeling property indeed fails\, and\, as a consequence\, obtain 
 late-time tails that decay two powers slower than the well-known Price's l
 aw rates.
LOCATION:Potter room
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