Some theoretical remarks on solar oscillations

The properties of the- linear modes of oscillation of a nonrotating nonmagnetic star, with particular reference to the sun, are briefly described. The most likely mechanisms by which they might be excited are reviewed, and it is concluded that stochastic excitation by turbulence is probably the dominant mechanism that drives the solar five minute oscillations. Phase coherence of one of the components of the SCLERA diameter data is illustrated, and the new five minute oscillations in the Birmingham whole-disk Doppler data are discussed. Finally some of the problems raised by conflicting evidence concerning the structure of the sun are aired, but not resolved.