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Oscillations in the polarized solar radio emission at 1.76 cm wavelength in 1992–2003

Published online by Cambridge University Press:  14 March 2005

A.G. Tlatov  and
A. Riehokainen
A.G. Tlatov
Affiliation:
Kislovodsk Solar Station of the Pulkovo Observatory, Russia, email: [email protected]
A. Riehokainen
Affiliation:
Tuorla Observatory, Turku University, Finland
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Abstract

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We investigated variations of the radio emission of the whole Sun at 1.76 cm obtained and archived at the Nobeyama radio heliograph in 1992–2003. For this purpose the daily data of the intensity and also right/left circular polarization of the radio emission with one-second average were processed. It was found that 3 minutes oscillations are present at the different phases of solar activity, including the minimum of activity. Especially conspicuous these oscillations present in a difference between the right and the left circular polarization. Intensity of the oscillations changes with a level of the solar activity. As we register fluctuations from the full Sun that their source can be not only sunspots but also and chromosphere of the Sun. Spectral analysis of the presence of 3-minute oscillations in polarization of the solar radio emission shows that there exist modulation with the periods of 27 and 157 days.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS223 , June 2004 , pp. 147 - 148
Copyright
© 2004 International Astronomical Union