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ID: 405206.0, MPI für Gravitationsphysik / Astrophysical Relativity
Gravitational-wave extraction from neutron-star oscillations: Comparing linear and nonlinear techniques
Authors:Baiotti, Luca; Bernuzzi, Sebastiano; Corvino, Giovanni; De Pietri, Roberto; Nagar, Alessandro
Date of Publication (YYYY-MM-DD):2009-01-06
Title of Journal:Physical Review D
Volume:79
Issue / Number:02
Sequence Number of Article:024002
Review Status:Peer-review
Audience:Not Specified
Abstract / Description: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 psi4; the gauge-invariant Regge-Wheeler-Zerilli-Moncrief metric-perturbation theory of a Schwarzschild space-time; some generalization of the quadrupole emission formula.
External Publication Status:published
Document Type:Article
Communicated by:Bernhard F. Schutz
Affiliations:MPI für Gravitationsphysik/Astrophysical Relativity
Identifiers:ISSN:0556-2821
DOI:10.1103/PhysRevD.79.024002
LOCALID:http://arxiv.org/abs/0808.4002
URL:http://link.aps.org/doi/10.1103/PhysRevD.79.024002
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