Abstract
Using data from the Global Oscillation Network Group (GONG) covering the period from 1995 to 1998, we study the change with solar activity in solar f-mode frequencies. The results are compared with similar changes detected from the Michelson Doppler Imager (MDI) data. We find variations in f-mode frequencies which are correlated with solar activity indices. If these changes are due to variation in solar radius then the implications are that the solar radius decreases by about 5 km from minimum to maximum activity.
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Antia, H., Basu, S., Pintar, J. et al. Solar Cycle Variation in Solar f-Mode Frequencies and Radius. Solar Physics 192, 459–468 (2000). https://doi.org/10.1023/A:1005204800696
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DOI: https://doi.org/10.1023/A:1005204800696