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SUMMARY:Rodrigo Panosso Macedo (Queen Mary University of London)
DTSTART:20210715T133000Z
DTEND:20210715T143000Z
DTSTAMP:20260423T021239Z
UID:CENTRA/47
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CENTRA/47/">
 Pseudospectrum and black hole quasi-normal mode (in)stability</a>\nby Rodr
 igo Panosso Macedo (Queen Mary University of London) as part of CENTRA Sem
 inar\n\n\nAbstract\nWe study the stability of quasi-normal modes (QNM) in 
 asymptotically flat black hole spacetimes by means of a pseudospectrum ana
 lysis. The construction of the Schwarzschild QNM pseudospectrum reveals: i
 ) the stability of the slowest decaying QNM under perturbations respecting
  the asymptotic structure\, reassessing the instability of the fundamental
  QNM discussed by Nollert (1996)\; ii) the instability of all overtones un
 der small scale perturbations of sufficiently high frequency\, that migrat
 e to a universal class of QNM branches along pseudospectra boundaries\, sh
 edding light on Nollert & Price's analysis (1996).\n
LOCATION:https://researchseminars.org/talk/CENTRA/47/
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