EDP Sciences
Free access
Volume 418, Number 1, April IV 2004
Page(s) 305 - 312
Section The Sun
DOI http://dx.doi.org/10.1051/0004-6361:20040035

A&A 418, 305-312 (2004)
DOI: 10.1051/0004-6361:20040035

On the effect of convection on solar p modes

M. Stix and Y. D. Zhugzhda

Kiepenheuer-Institut für Sonnenphysik, Schöneckstr. 6, 79104 Freiburg, Germany
(Received 22 April 2003 / Accepted 14 January 2004 )

We investigate the modulation of acoustic wave modes by convection. We consider a cavity that encloses a layer of convection rolls. The stratification due to gravity is taken into account. For the acoustic oscillation we use a harmonic expansion for the horizontal dependence, while a finite-difference scheme is employed in the vertical direction. We calculate the eigenfrequencies of the acoustic modes under adiabatic conditions, as functions of the velocity amplitude of the convection. The results confirm the frequency decreases found in earlier non-stratified models with only a vertical component of the convective velocity.

Key words: convection -- Sun: oscillations -- methods: analysical

Offprint request: M. Stix, stix@kis.uni-freiburg.de

© ESO 2004