Dynamical excitation of space-time modes of compact objects

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dc.creatorBernuzzi, Sebastiano
dc.creatorNagar, Alessandro
dc.creatorDe Pietri, Roberto
dc.date2008-01-14
dc.date2008-03-06
dc.date.accessioned2026-07-07T11:14:04Z
dc.date.available2026-07-07T11:14:04Z
dc.descriptionWe discuss, in the perturbative regime, the scattering of Gaussian pulses of odd-parity gravitational radiation off a non-rotating relativistic star and a Schwarzschild Black Hole. We focus on the excitation of the $w$-modes of the star as a function of the width $b$ of the pulse and we contrast it with the outcome of a Schwarzschild Black Hole of the same mass. For sufficiently narrow values of $b$, the waveforms are dominated by characteristic space-time modes. On the other hand, for sufficiently large values of $b$ the backscattered signal is dominated by the tail of the Regge-Wheeler potential, the quasi-normal modes are not excited and the nature of the central object cannot be established. We view this work as a useful contribution to the comparison between perturbative results and forthcoming $w$-mode 3D-nonlinear numerical simulation.
dc.descriptionRevTeX, 9 pages, 7 figures, Published in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/0801.2090
dc.identifierhttp://arxiv.org/abs/0801.2090
dc.identifierPhys.Rev.D77:044042,2008
dc.identifierdoi:10.1103/PhysRevD.77.044042
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191938
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleDynamical excitation of space-time modes of compact objects
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