Solar cycle variation in solar f-mode frequencies and radius

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.

To appear in Solar Physics

References in corpus (2)

• Accurate Determination of the Solar Photospheric Radius
• High frequency and high wavenumber solar oscillations

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