Long-period oscillations of the apparent solar diameter - Observations

Details Long-period oscillations of the apparent solar diameter - Observations Long-period oscillations of the apparent solar diameter - Observations

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...223..324b&link_type=abstract

Astrophysical Journal, Part 1, vol. 223, July 1, 1978, p. 324-338. NSF-supported research.

Physics

42

Diameters, Periodic Variations, Solar Atmosphere, Solar Physics, Stellar Models, Stellar Motions, Data Processing, Error Analysis, Oscillations, Power Spectra, Radiative Transfer, Random Noise, Solar Granulation, Velocity Measurement

Scientific paper

New observations of the time-varying component of the apparent solar diameter are reported. Power spectra derived from these observations reveal narrow-band oscillations at frequencies consistent with the normal mode frequencies of a standard solar model. The amplitudes of these oscillations are discussed and related to the observations of other investigators. A detailed analysis of the experiment and its associated sources of error is presented and used to show that there is a very small likelihood that the power spectrum peaks are due to nonsolar causes.

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