THE INFLUENCE OF TURBULENCE ON THE SOLAR P-MODE FREQUENCIES

Calculations were carried out in order to probe the influence of turbu lence on the solar oscillation frequencies as a possible explanation o f the difference between observed and computed mode frequencies. As a first step the analysis is restricted to the radial oscillation modes. Corrections to the oscillation equations due to turbulence are determ ined with the help of perturbation theory, and the influence on the so lar mixing length model is tested by recalculating the solar convectio n zone. The first interesting result is that the first order correctio ns in the oscillation equations arising from the Reynolds stress do no t simply produce a blueshift. For small frequencies, due to the form o f the turbulent velocity field, we can observe a redshift of the frequ encies as well. The zeroth order corrections seem to have only a small influence on the results. For the turbulent modifications of the spee d of sound (i.e., the correlation of density and temperature fluctuati ons), that were predicted as redshifted in a previous paper we find on the other hand, when we include the zeroth order corrections in our m odel as well, the difference turns into an overall blueshift.