- NORDITA, København, Denmark
- HAO, Boulder, Colorado, USA
- Astronomisk Institut, Aarhus Universitet, DK-8000, Aarhus C, Denmark
The dependence of adiabatic oscillations, particularly their frequencies, on the structure of the sun or other stars is analyzed, on the basis of asymptotic analysis and numerical computations. As a particular example I consider the effects of mixing in the solar core; mixing sufficiently strong to bring the computed neutrino flux into agreement with the observations appears to be inconsistent with the oscillation observations. I also discuss the effects of modifications to the upper, superadiabatic part of the convection zone.