Full-disk observations of solar oscillations from the geographic South Pole - Latest results

Details Full-disk observations of solar oscillations from the geographic South Pole - Latest results Full-disk observations of solar oscillations from the geographic South Pole - Latest results

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...82...55g&link_type=abstract

(International Astronomical Union and Akademiia Nauk SSSR, Colloquium on Problems of Solar and Stellar Oscillations, 66th, Nauch

Physics

140

Doppler Effect, Polar Regions, Solar Oscillations, Space Observations (From Earth), Fourier Analysis, Power Spectra, Southern Sky, Temporal Resolution

Scientific paper

This paper presents the latest results obtained from the analysis of the full-disk Doppler shift observations obtained at the geographic South Pole in 1981. About 80 normal modes of oscillation (l equals 0-3) have now been identified. Their frequencies range from 1886 micro Hz (l equals 1, n equals 12) to 5074.5 micro Hz (l equals 2, n equals 35), and their amplitudes are as low as 2.5 cm/s. Amplitude modulation occurs with periods of 1-2 days, and the individual oscillations appear to be excited randomly and independently. In cases where other groups have observed some of the modes identified by us, the agreement in frequency is good.

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