Ten years observations of long-period oscillations of the Sun

Details Ten years observations of long-period oscillations of the Sun Ten years observations of long-period oscillations of the Sun

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.220..189k&link_type=abstract

In ESA The Hydromagnetics of the Sun p 189-190 (SEE N85-25091 14-92)

Physics

1

Fraunhofer Lines, Periodic Variations, Solar Oscillations, Solar Spectra, Doppler Effect, Extraterrestrial Radiation, Power Spectra, Solar Gravitation, Telluric Lines

Scientific paper

The measurements of Doppler shift of a Fraunhofer spectral line were performed over 10 yr. The power spectrum of the data shows a major peak at 160m period which is interpreted as multiple resonance of gravity modes of the Sun. This 160m oscillation reveals remarkable phase stability during the entire decade. It is noted that true pattern of the power spectrum can be seriously spoiled by Earth sources of noise. The importance of analysis of oscillations seen in a telluric line is emphasized.

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