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Astron. Astrophys. 351, 747-751 (1999)

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The influence of the Reynolds stress on the solar p-mode frequencies

S. Böhmer and G. Rüdiger

Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany

Received 20 May 1999 / Accepted 24 September 1999

Abstract

We examine the influence of the Reynolds stress as the main contribution of turbulence on the oscillation frequencies of the solar p-modes. We regard the radial oscillations as well as the nonradial ones in order to study the influence depending on the degree l of the modes.

For the radial modes we find that the influence of the turbulence gives corrections that reduce significantly the difference between observed and theoretical calculated frequencies. Regarding the nonradial modes we find, additionally, an increase in the corrections with the harmonic degree l which is in good agreement with the observations.

We consider turbulent corrections appearing in the oscillation equations as well as the changes of the model itself for consistency. For radial and nonradial modes we find that the changes of the model are of minor importance compared to the turbulence terms appearing directly in the equations of the oscillation.

Key words: turbulence – Sun: oscillations

Send offprint requests to: Günther Rüdiger

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© European Southern Observatory (ESO) 1999

Online publication: November 3, 1999
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