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Full-Disk Observations of Solar Oscillations from the Geographic South Pole: Latest Results*

Published online by Cambridge University Press:  12 April 2016

Gérard Grec ,
Eric Fossat  and
Martin A. Pomerantz
Gérard Grec
Affiliation:
Department D'Astrophysique de l'I.M.S.P., E.R.A. du C.N.R.S., Université de Nice, Pare Valrose F-06034, Nice Cedex, France
Eric Fossat
Affiliation:
Observatoire de Nice, BP252, 06007 Nice Cedex, France
Martin A. Pomerantz
Affiliation:
Bartol Research Foundation of The Franklin Institute, University of Delaware, Newark, Delaware, U.S.A.

Abstract

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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 = 0–3) have now been identified. Their frequencies range from 1886 μHz (l = 1, n = 12) to 5074.5 μHz (l = 2, n = 35), and their amplitudes are as low as 2.5 cm s–1. 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.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 66: Problems of Solar and Stellar Oscillations , 1983 , pp. 55 - 66
Copyright
Copyright © Reidel 1983

Footnotes

*

Proceedings of the 66th IAU Colloquium: Problems in Solar and Stellar Oscillations, held at the Crimean Astrophysical Observatory, U.S.S.R., 1–5 September, 1981.

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