Statistics – Applications
Scientific paper
Apr 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.183...61k&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 183, Apr. 1978, p. 61-78.
Statistics
Applications
33
Doppler Effect, Frequency Shift, Iron, Periodic Variations, Power Spectra, Solar Spectra, Error Analysis, Magnetic Effects, Solar Magnetic Field, Spectroheliographs
Scientific paper
Evidence is presented which shows that a previously observed 160-min oscillation in the solar surface and certain other periodic oscillations that have persisted for three years are of intrinsic solar origin and cannot be ascribed to any possible sources of error in observations or measurements. A method is described which involves measurement of the relative Doppler shift between a spectral line from the whole central portion of the solar disk and the same line produced by the whole outer rim of the disk. Results are discussed for applications of this method to the magnetically insensitive line of Fe I at 5123.7 A. Various analyses of the data obtained are performed, possible sources of systematic error are eliminated, and it is demonstrated that significant periods of solar oscillation exist, the most significant being 160 min. Attempts made to detect oscillations in mean solar magnetic fields and brightness as well as in the brightness of Uranus are noted.
Kotov Valerii A.
Severnyi A. B.
Tsap T. T.
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