| Issue |
A&A
Volume 376, Number 2, September II 2001
|
|
|---|---|---|
| Page(s) | 708 - 712 | |
| Section | Astronomical instrumentation | |
| DOI | https://doi.org/10.1051/0004-6361:20011030 | |
| Published online | 15 September 2001 | |
The effect of time-dependent random mass density field on frequencies of solar sound waves
1
Department of Environmental Physics, Technical University of Lublin, ul. Nadbystrzycka 40, 20-618 Lublin, Poland
2
Institute of Atomic and Molecular Physics, National Research Council, Via Moruzzi 1, 56124 Pisa, Italy
Corresponding author: K. Murawski, kamur@akropolis.pol.lublin.pl
Received:
26
March
2001
Accepted:
26
June
2001
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.
Key words: convection / Sun: oscillations / turbulence
© ESO, 2001
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