Gravitational waves from pulsations of neutron stars described by realistic Equations of State

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dc.creatorBernuzzi, Sebastiano
dc.creatorNagar, Alessandro
dc.date2008-03-26
dc.date2008-08-29
dc.date.accessioned2026-07-07T11:33:22Z
dc.date.available2026-07-07T11:33:22Z
dc.descriptionIn this work we discuss the time-evolution of nonspherical perturbations of a nonrotating neutron star described by a realistic Equation of State (EOS). We analyze 10 different EOS for a large sample of neutron star models. Various kind of generic initial data are evolved and the corresponding gravitational wave signals are computed. We focus on the dynamical excitation of fluid and spacetime modes and extract the corresponding frequencies. We employ a constrained numerical algorithm based on standard finite differencing schemes which permits stable and long term evolutions. Our code provides accurate waveforms and allows to capture, via Fourier analysis of the energy spectra, the frequencies of the fluid modes with an accuracy comparable to that of frequency domain calculations. The results we present here are useful for provindig comparisons with simulations of nonlinear oscillations of (rotating) neutron star models as well as testbeds for 3D nonlinear codes.
dc.description17 pages, 9 figures. Small changes. Version published in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/0803.3804
dc.identifierhttp://arxiv.org/abs/0803.3804
dc.identifierPhys.Rev.D78:024024,2008
dc.identifierdoi:10.1103/PhysRevD.78.024024
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197866
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.titleGravitational waves from pulsations of neutron stars described by realistic Equations of State
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