Gravitational-wave extraction from neutron-star oscillations: Comparing linear and nonlinear techniques

Luca Baiotti, Sebastiano Bernuzzi, Giovanni Corvino, Roberto De Pietri, and Alessandro Nagar
Phys. Rev. D 79, 024002 – Published 6 January 2009; Erratum Phys. Rev. D 81, 049902 (2010)

Abstract

The main aim of this study is the comparison of gravitational waveforms obtained from numerical simulations which employ different numerical evolution approaches and different wave-extraction techniques. For this purpose, we evolve an oscillating, nonrotating, polytropic neutron-star model with two different approaches: a full nonlinear relativistic simulation (in three dimensions) and a linear simulation based on perturbation theory. The extraction of the gravitational-wave signal is performed via three methods: the gauge-invariant curvature-perturbation theory based on the Newman-Penrose scalar ψ4; the gauge-invariant Regge-Wheeler-Zerilli-Moncrief metric-perturbation theory of a Schwarzschild space-time; some generalization of the quadrupole emission formula.

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  • Received 27 August 2008
  • Publisher error corrected 28 January 2010

DOI:https://doi.org/10.1103/PhysRevD.79.024002

©2009 American Physical Society

Corrections

28 January 2010

Erratum

Publisher’s Note: Gravitational-wave extraction from neutron-star oscillations: Comparing linear and nonlinear techniques [Phys. Rev. D 79, 024002 (2009)]

Luca Baiotti, Sebastiano Bernuzzi, Giovanni Corvino, Roberto De Pietri, and Alessandro Nagar
Phys. Rev. D 81, 049902 (2010)

Authors & Affiliations

Luca Baiotti1,2, Sebastiano Bernuzzi3, Giovanni Corvino2,3, Roberto De Pietri3, and Alessandro Nagar4,5,6

  • 1Graduate School of Arts and Sciences, University of Tokyo, Komaba, Meguro-ku, Tokyo, 153-8902, Japan
  • 2Max Planck Institut für Gravitationsphysik, Albert-Einstein-Institut, Potsdam-Golm, Germany
  • 3Dipartimento di Fisica, Università di Parma and INFN, Gruppo Collegato di Parma, via G. B. Usberti 7/A, 43100 Parma, Italy
  • 4Institut des Hautes Etudes Scientifiques, 91440 Bures-sur-Yvette, France
  • 5INFN, Sezione di Torino, Via Pietro Giuria 1, Torino, Italy
  • 6ICRANet, 65122 Pescara, Italy

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Issue

Vol. 79, Iss. 2 — 15 January 2009

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