CHAPLIN, W. J., JIMENEZ-REYES, S. J., EFF-DARWICH, A., ELSWORTH, Y. and NEW, R. (2008). A devil in the detail: parameter cross-talk from the solar cycle and estimation of solar p-mode frequencies. Monthly notices of the Royal Astronomical Society, 385 (3), 1605-1612.Full text not available from this repository.
Frequencies, powers and damping rates of the solar p modes are all observed to vary over the 11-yr solar activity cycle. Here, we show that simultaneous variations in these parameters give rise to a subtle cross-talk effect, which we call the 'devil in the detail', that biases p-mode frequencies estimated from analysis of long power frequency spectra. We also show that the resonant peaks observed in the power frequency spectra show small distortions due to the effect. Most of our paper is devoted to a study of the effect for Sun-as-a-star observations of the low-l p modes. We show that for these data the significance of the effect is marginal. We also touch briefly on the likely l dependence of the effect, and discuss the implications of these results for solar structure inversions.
|Research Institute, Centre or Group:||Materials and Engineering Research Institute > Thin Films Research Centre > Nanotechnology Centre for PVD Research|
|Depositing User:||Ann Betterton|
|Date Deposited:||24 May 2010 14:01|
|Last Modified:||24 May 2010 14:01|
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