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arXiv · 1910.09677

Spectral Cauchy-characteristic extraction of the gravitational wave news function

Kevin Barkett·Jordan Moxon·Mark A. Scheel·Béla Szilágyi
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Abstract

We present an improved spectral algorithm for Cauchy-characteristic extraction and characteristic evolution of gravitational waves in numerical relativity. The new algorithms improve spectral convergence both at the poles of the spherical-polar grid and at future null infinity, as well as increase the temporal resolution of the code. The key to the success of these algorithms is a new set of high-accuracy tests, which we present here. We demonstrate the accuracy of the code and compare with the existing PittNull implementation.

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Kevin Barkett, Jordan Moxon, Mark A. Scheel, Béla Szilágyi. 2019-10-21. Spectral Cauchy-characteristic extraction of the gravitational wave news function. https://doi.org/10.1103/physrevd.102.024004

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