PIRSA:C21006 - The 24th Capra meeting on Radiation Reaction in General RelativityPODCAST Subscribe to podcast

The 24th Capra meeting on Radiation Reaction in General Relativity

Organizer(s): Beatrice Bonga   Anna Heffernan   Luis Lehner   Eric Poisson   Erik Schnetter   Daniel Siegel   Huan Yang  

Collection URL: http://pirsa.org/C21006

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PIRSA:21060016  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Self force review
Date: 07/06/2021 - 8:00 am

PIRSA:21060005  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Discontinuous collocation methods and self-force applications
Abstract: Numerical simulations of extereme mass ratio inspirals face several computational challenges. We present a new approach to evolving partial differential equations occurring in black hole perturbation theory and calculations of the self-force acting on point particles orbiting supermassive black hole... read more
Date: 07/06/2021 - 8:45 am

PIRSA:21060006  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Conformal numerical method for self force applications in the time domain
Abstract: "In 2034 LISA is due to be launched, which will provide the opportunity to extract physics from stellar objects and systems that would not otherwise be possible, among which are EMRIs. Unlike previous sources detected at LIGO, these sources can be simulated using an accurate computation of the gravi... read more
Date: 07/06/2021 - 9:00 am

PIRSA:21060007  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Kerr self-force via elliptic PDEs: Background and theory (part 1)
Speaker(s): Nami Nishimura
Abstract: Our long-term goal is to calculate the Lorenz gauge gravitational self-force for an extreme mass-ratio binary system in Kerr spacetime. Past work in the time-domain has encountered time instabilities for the two lowest modes m=0 and m=1. In order to overcome this problem, we enter the frequency-doma... read more
Date: 07/06/2021 - 9:15 am

PIRSA:21060008  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Kerr self-force via elliptic PDEs: Numerical methods (part 2)
Speaker(s): Thomas Osburn
Abstract: I will discuss the numerical methods we use to calculate the self-force on a scalar charge orbiting a Kerr black hole. We apply a 2nd-order finite difference scheme on a rectangular grid in the r*-θ plane. By working in the frequency domain and separating the ϕ variable (but not θ) we encounter e... read more
Date: 07/06/2021 - 9:30 am

PIRSA:21060009  ( MP4 Medium Res , MP3 , PDF ) Which Format?
A multi-mode time-domain surrogate model for gravitational wave signals from comparable to extreme mass-ratio black hole binaries
Speaker(s): Tousif Islam
Abstract: We present EMRISur1dq1e6, a reduced-order multi-mode time-domain surrogate model of gravitational waveforms for non-spinning black hole binary systems with comparable- to extreme mass-ratio configurations. This surrogate model is trained on waveform data generated by a point-particle black hole pert... read more
Date: 07/06/2021 - 10:00 am

PIRSA:21060010  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Fast Self-Forced Inspirals into a Rotating Black Hole
Speaker(s): Philip Lynch
Abstract: Analysing the data for the upcoming LISA mission will require extreme mass ratio inpsiral (EMRI) waveforms waveforms that are not only accurate but also fast to compute and extensive in the parameter space. To this end, we present a method for rapidly calculating the inspiral trajectory of EMRIs wit... read more
Date: 07/06/2021 - 10:15 am

PIRSA:21060011  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Improving Semi-Analytic Spin Precession with NITs
Speaker(s): Michael LaHaye
Abstract: Semi-analytic solutions are useful because they are much faster than full numerical evolutions by virtue of the fact that they do not have to use as many points to achieve similar levels of accuracy. Currently there exists a semi-analytic solution for spin precessing binaries, which is implemented i... read more
Date: 07/06/2021 - 10:30 am

PIRSA:21060012  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Flux-balance laws in the Kerr spacetime
Speaker(s): Alexander Grant
Abstract: The motion of a radiating point particle in the Kerr spacetime can be represented by a series of geodesics whose constants of motion change slowly over its motion. In the case of energy and axial angular momentum, there are conserved currents, defined for the field, whose fluxes at infinity and the... read more
Date: 07/06/2021 - 10:45 am

PIRSA:21060013  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Self-consistent adiabatic inspiral and transition motion
Speaker(s): Lorenzo Küchler
Abstract: We describe the transition to plunge of a point particle around the last stable orbit of Kerr at leading order in the transition-timescale expansion. Taking systematically into account all self-force effects, we prove that the transition motion is still described by the Painlevé transcendent equati... read more
Date: 07/06/2021 - 11:00 am

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