Characteristic extraction tool for gravitational waveforms

M. C. Babiuc, B. Szilágyi, J. Winicour, and Y. Zlochower
Phys. Rev. D 84, 044057 – Published 29 August 2011

Abstract

We develop and calibrate a characteristic waveform extraction tool whose major improvements and corrections of prior versions allow satisfaction of the accuracy standards required for advanced LIGO data analysis. The extraction tool uses a characteristic evolution code to propagate numerical data on an inner worldtube supplied by a 3+1 Cauchy evolution to obtain the gravitational waveform at null infinity. With the new extraction tool, high accuracy and convergence of the numerical error can be demonstrated for an inspiral and merger of mass M binary black holes even for an extraction worldtube radius as small as R=20M. The tool provides a means for unambiguous comparison between waveforms generated by evolution codes based upon different formulations of the Einstein equations and based upon different numerical approximations.

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  • Received 17 November 2010

DOI:https://doi.org/10.1103/PhysRevD.84.044057

© 2011 American Physical Society

Authors & Affiliations

M. C. Babiuc1,3, B. Szilágyi2,3, J. Winicour3,4, and Y. Zlochower5

  • 1Department of Physics, Marshall University, Huntington, West Virginia 25755, USA
  • 2Theoretical Astrophysics, California Institute of Technology, Pasadena, California 91125, USA
  • 3Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
  • 4Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, 14476 Golm, Germany
  • 5Center for Computational Relativity and Gravitation and School of Mathematical Sciences, Rochester Institute of Technology, Rochester, New York 14623, USA

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Issue

Vol. 84, Iss. 4 — 15 August 2011

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