Abstract
Frequencies of solar 5-min oscillations can be used to determine directly the sound speed of the solar interior. The determination described here does not depend on a solar model, but relies only on a simple asymptotic description of the oscillations in terms of trapped acoustic waves.
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Christensen-Dalsgaard, J., Duvall, T., Gough, D. et al. Speed of sound in the solar interior. Nature 315, 378–382 (1985). https://doi.org/10.1038/315378a0
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DOI: https://doi.org/10.1038/315378a0
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