Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session J16: Low-Frequency Gravitational Wave Detectors: PTAs and LISA
1:30 PM–3:18 PM,
Sunday, April 14, 2019
Sheraton
Room: Grand Ballroom I
Sponsoring
Unit:
DGRAV
Chair: Thomas Kupfer, KITP, Santa Barbara
Abstract: J16.00008 : Physical objects approaching the Cauchy horizon of a fast spinning Kerr black hole
2:54 PM–3:06 PM
View Presentation Abstract
Presenter:
Caroline Mallary
(University of Massachusetts Dartmouth)
Authors:
Caroline Mallary
(University of Massachusetts Dartmouth)
Gaurav Khanna
(University of Massachusetts Dartmouth)
Lior M Burko
(Georgia Gwinnett College)
We solve the 2+1-dimensional Teukolsky equation numerically for the Weyl scalars ψ0 and ψ4 along a time-like geodesic intersecting with the Cauchy horizon of a rapidly rotating perturbed Kerr black hole. We find that both the amplitude and frequency of the Weyl scalars agree with the results of linear perturbation analysis. We then model a physical object by a simple damped harmonic oscillator, which is driven by an external force that mimics the tidal force experienced by the infalling object. We use this model to find the total deformation of the object at the Cauchy horizon, and the resonant effect when the driving force’s frequency matches the internal frequency of the oscillator that models the object.
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