Abstract
Various attempts have been made in the past two decades to determine the properties of the core of the Sun, by measurements of solar neutrino radiation, the distortion of the solar gravitational potential and frequency splittings of solar oscillation modes. In the latter category, the two best measurements have been made by Duvall and Harvey1 and by Brown2; both showed splitting roughly independent of spherical harmonic degree l, and both had a peculiar peak in the measured splitting at l = 11. We present here new results, based on the analysis of 6,656 individual oscillation modes for 5 ≤ l ≤ 20. These data yield a splitting spectrum which is consistent with previous measurements, but without the unusual peak at l = 11, thus suggesting that a simple standard model for the solar core is essentially correct.
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Libbrecht, K. Is there an unusual solar core?. Nature 319, 753–755 (1986). https://doi.org/10.1038/319753a0
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DOI: https://doi.org/10.1038/319753a0
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