LOW-FREQUENCY, LOW-DEGREE SOLAR P-MODE MEASUREMENTS FROM RECENT BISONDATA

We present high-quality measurements of the frequencies of some acoust ic modes of oscillation of the Sun, as determined from recent full-dis c BiSON data. These cover the range 0 less than or equal to l less tha n or equal to 3 and 7 less than or equal to n less than or equal to 14 . Several of the mode frequencies have been measured to accuracies as high as 5 parts in 10(6), as determined by the formal mode-fitting unc ertainties. When compared with the model frequencies of the AARHUS gro up (model OPAL1 from Basu et al.) in which the Livermore equation of s tate, the Livermore opacities and both helium and heavy element diffus ion and settling have been incorporated, the frequency differences (in the sense BiSON minus OPAL1) are typically of the order of only simil ar to -0.1 mu Hz over this frequency region.