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

Baiotti, L., Bernuzzi, S., Corvino, G., De Pietri, R., & Nagar, A. (2009). Gravitational-wave extraction from neutron-star oscillations: Comparing linear and nonlinear techniques. Physical Review D, 79(02): 024002. doi:10.1103/PhysRevD.79.024002.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-4555-9 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-4556-7
Genre: Journal Article

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 Creators:
Baiotti, Luca1, Author
Bernuzzi, Sebastiano, Author
Corvino, Giovanni1, Author
De Pietri, Roberto1, Author
Nagar, Alessandro, Author
Affiliations:
1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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 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 psi4; 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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 Dates: 2009-01-06
 Publication Status: Issued
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 Identifiers: eDoc: 405206
DOI: 10.1103/PhysRevD.79.024002
Other: http://arxiv.org/abs/0808.4002
URI: http://link.aps.org/doi/10.1103/PhysRevD.79.024002
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Title: Physical Review D
Source Genre: Journal
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Pages: - Volume / Issue: 79 (02) Sequence Number: 024002 Start / End Page: - Identifier: ISSN: 0556-2821