Speakers

View Full Calendar

Physics Colloquium: Emanuele Berti (Johns Hopkins), Title: "Agnostic black hole spectroscopy"

Event Type
Lecture
Sponsor
Department of Physics
Location
Loomis Lab 141 and via Zoom
Virtual
wifi event
Date
Feb 22, 2023   4:00 pm  
Speaker
Emanuele Berti (Johns Hopkins)
Contact
Kelly Darr
E-Mail
khdarr@illinois.edu
Phone
12173007821
Views
105
Originating Calendar
Physics - Colloquium

According to general relativity, the remnant of a binary black hole merger should be a perturbed Kerr black hole. Perturbed Kerr black holes emit "ringdown" radiation which is well described by a superposition of quasinormal modes, with frequencies and damping times that depend only on the mass and spin of the remnant. The observation of gravitational radiation emitted by black hole mergers might finally provide direct evidence of black holes with the same certainty as, say, the 21 cm line identifies interstellar hydrogen. I will review the current status of this "black hole spectroscopy" 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?

link for robots only