The effect of a time-dependent random mass density field on the frequencies and amplitudes of solar $p$-modes approximated as sound waves is considered by analytical perturbative means and numerical simulations for one-dimensional hydrodynamic equations. The analytical results, which are worked out for a Gaussian spectrum of the random mass fluctuations, show frequency increase and amplitude amplification, in agreement with numerical simulations.
The effect of time-dependent random mass density field on frequencies of solar sound waves
NOCERA L;
2001
Abstract
The effect of a time-dependent random mass density field on the frequencies and amplitudes of solar $p$-modes approximated as sound waves is considered by analytical perturbative means and numerical simulations for one-dimensional hydrodynamic equations. The analytical results, which are worked out for a Gaussian spectrum of the random mass fluctuations, show frequency increase and amplitude amplification, in agreement with numerical simulations.File in questo prodotto:
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Descrizione: The effect of time-dependent random mass density field on frequencies of solar sound waves
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