BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Emanuele Berti \, Johns Hopkins University\n\n
According to general relativity\, the remnant of a binary black hole merger should be a perturbed Kerr black hole. Perturbed Kerr black holes emit "\;ringdow n"\; radiation which is well described by a superposition of quasinorm al modes\, with frequencies and damping times that depend only on the mass and spin of the remnant. The observation of gravitational radiation emitt ed by black hole mergers might finally provide direct evidence of black ho les with the same certainty as\, say\, the 21 cm line identifies interstel lar hydrogen. I will review the current status of this "\;black hole s pectroscopy"\; program. I will focus on two important open issues: (1) Is the waveform well described by linear black hole perturbation theory? (2) What is the current observational status of black hole spectroscopy? span>
\n DTSTART:20230428T193000Z LOCATION:Clark Hall\, Room 108 SUMMARY:Agnostic black hole spectroscopy END:VEVENT END:VCALENDAR