An observational investigation of long period oscillations in the apparent solar diameter

Details An observational investigation of long period oscillations in the apparent solar diameter An observational investigation of long period oscillations in the apparent solar diameter

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977phdt.........5b&link_type=abstract

Ph.D. Thesis Colorado Univ., Boulder.

Physics

4

Plasma Oscillations, Power Spectra, Solar Physics, Sun, Time Series Analysis, Diameters, Solar Atmosphere, Stellar Structure, Wave Propagation

Scientific paper

A power spectrum analysis of eleven individual time series observations of the apparent solar diameter reveals oscillations throughout the three minute to 70 minute period range, with typical amplitudes of .000002 of the solar diameter. Many of the long period peaks in the power spectrum appear to be narrow-band features, with damping times long compared to the length of a typical time series. At least ten of the observed peaks show repeatable power levels that are significant at the 0.999 confidence level, and two of them appear to show good phase coherence over the entire 30 day observation period.

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