Spectrum and amplitudes of internal gravity waves excited by penetrative convection in solar-type stars

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dc.creatorDintrans, B.
dc.creatorBrandenburg, A.
dc.creatorNordlund, A.
dc.creatorStein, R. F.
dc.date2005-02-07
dc.date2005-04-11
dc.date.accessioned2026-07-07T06:18:55Z
dc.date.available2026-07-07T06:18:55Z
dc.descriptionThe excitation of internal gravity waves by penetrative convective plumes is investigated using 2-D direct simulations of compressible convection. The wave generation is quantitatively studied from the linear response of the radiative zone to the plumes penetration, using projections onto the g-modes solutions of the associated linear eigenvalue problem for the perturbations. This allows an accurate determination of both the spectrum and amplitudes of the stochastically excited modes. Using time-frequency diagrams of the mode amplitudes, we then show that the lifetime of a mode is around twice its period and that during times of significant excitation up to 40% of the total kinetic energy may be contained into g-modes.
dc.description13 pages, 19 figures, accepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0502138
dc.identifierhttp://arxiv.org/abs/astro-ph/0502138
dc.identifierAstron.Astrophys. 438 (2005) 365-376
dc.identifierdoi:10.1051/0004-6361:20052831
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/94904
dc.subjectAstrophysics
dc.titleSpectrum and amplitudes of internal gravity waves excited by penetrative convection in solar-type stars
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