PIRSA:21060064

Worldtube excision method for intermediate-mass-ratio inspirals: scalar-field toy model

Rüter, H. (2021). Worldtube excision method for intermediate-mass-ratio inspirals: scalar-field toy model. Perimeter Institute. https://pirsa.org/21060064

Rüter, Hannes. Worldtube excision method for intermediate-mass-ratio inspirals: scalar-field toy model. Perimeter Institute, Jun. 08, 2021, https://pirsa.org/21060064 

          @misc{ pirsa_PIRSA:21060064,
            doi = {10.48660/21060064},
            url = {https://pirsa.org/21060064},
            author = {R{\"u}ter, Hannes},
            keywords = {Other},
            language = {en},
            title = {Worldtube excision method for intermediate-mass-ratio inspirals: scalar-field toy model},
            publisher = {Perimeter Institute},
            year = {2021},
            month = {jun},
            note = {PIRSA:21060064 see, \url{https://pirsa.org}}
          }

Hannes Rüter Max Planck Institute for Gravitational Physics (Albert Einstein Institute) and Institute for Gravitational Physics of the Leibniz Universität Hannover

Talk numberPIRSA:21060064
DOI10.48660/21060064
Collection
Talk Type Conference
Subject

Abstract

"We propose and explore a method for alleviating the scale disparity in numerical relativity simulations with mass ratios in the intermediate astrophysical range ($10^2 \lesssim q\lesssim 10^4$), where purely perturbative methods may not be adequate. A region around the smaller object considerably smaller than its horizon is excised from the numerical domain, and replaced with an analytical model approximating a tidally deformed black hole. We develop the basic idea and try it on the toy model of a scalar charge in a circular geodesic orbit around a Schwarzschild black hole, solving for the scalar field as a linear perturbation in a 1+1D framework. Collaborators: Mekhi Dhesi, Adam Pound, Leor Brack, Harald Pfeiffer"