Low-frequency, low-degree solar p-mode measurements from recent BiSON⋆ data
Open Access
- 1 September 1996
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 282 (1) , L15-L19
- https://doi.org/10.1093/mnras/282.1.L15
Abstract
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 ≤ ℓ ≤ 3 and 7 ≤ n ≤ 14. Several of the mode frequencies have been measured to accuracies as high as 5 parts in 106, 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 ∼ − 0.1 ¼Hz over this frequency region.Keywords
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