EDP Sciences
Free access
Issue
A&A
Volume 376, Number 2, September II 2001
Page(s) 708 - 712
Section Physical and chemical processes
DOI http://dx.doi.org/10.1051/0004-6361:20011030


A&A 376, 708-712 (2001)
DOI: 10.1051/0004-6361:20011030

The effect of time-dependent random mass density field on frequencies of solar sound waves

K. Murawski1, L. Nocera2 and M. Medrek1

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

(Received 26 March 2001 / Accepted 26 June 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.


Key words: convection -- Sun: oscillations -- turbulence

Offprint request: K. Murawski, kamur@akropolis.pol.lublin.pl

SIMBAD Objects in preparation



© ESO 2001