HELIOSEISMOLOGY AND STANDARD SOLAR MODELS

We present a systematical analysis of uncertainties in the helioseismo logical determination of quantities characterizing the solar structure . We discuss the effect of errors on the measured frequencies, the res idual solar model dependence and the uncertainties of the inversion me thod. We find Y-ph = 0.238 - 0.259, R-b/R. = 0.708 - 0.714 and rho(b) = (0.185 - 0.199) gr/cm(3) (the index b refers to the bottom of the co nvective envelope). In the interval 0.2 < R/R. < 0.65, the quantity U = P/rho is determined with and accuracy of +/-5 parts per thousand or better. The predictions of a few recent solar model calculations are c ompared with helioseismological results. (C) 1997 Elsevier Science B.V .