Abstract
The total solar irradiance measurements obtained by the active-cavity radiometer on board the Solar Maximum Mission have been analyzed for evidence of global oscillations. We find that the most energetic low-degree p-mode oscillations in the five-minute band have amplitudes of a few parts per million of the total irradiance, and we positively detect modes with l = 0, 1, and 2. The distribution in l differs from that of the velocity spectrum, with relatively more power at lower l values. The individual modes have narrow line widths, corresponding to values of Q greater than a few thousand, or lifetimes of at least a week. We do not detect the 160-min oscillation in the power spectrum, and place an upper limit of 5 parts per million (99.9% confidence) on its amplitude.
proceedings of the 66th IAU Colloquium: Problems in Solar and Stellar Oscillations, held at the Crimean Astrophysical Observatory, U.S.S.R.., 1–5 September, 1981.
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© 1983 D. Reidel Publishing Co, Dordrecht, Holland, and Boston, U.S.A.
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Woodard, M., Hudson, H. (1983). Solar Oscillations Observed in the Total Irradiance. In: Gough, D.O. (eds) Problems of Solar and Stellar Oscillations. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-7088-5_7
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DOI: https://doi.org/10.1007/978-94-009-7088-5_7
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