Low-frequency, low-degree solar p-mode measurements from recent BiSON data

We present high-quality measurements of the frequencies of some acoustic modes of oscillation of the Sun, as determined from recent full-disc BiSON data. These cover the range 0 less than or equal to l less than 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 uncertainties. When compared with the model frequencies of the AARHUS group (model OPAL1 from Basu et al.) in which the Livermore equation of state, the Livermore opacities and both helium and heavy element diffusion and settling have been incorporated, the frequency differences (in the sense BiSON minus OPAL1) are typically of the order of only similar to -0.1 mu Hz over this frequency region.