Global Development of the Solar Cycle as Found from the Nobeyama Radio Observations

Details Global Development of the Solar Cycle as Found from the Nobeyama Radio Observations Global Development of the Solar Cycle as Found from the Nobeyama Radio Observations

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spnr.conf...95g&link_type=abstract

Solar Physics with the Nobeyama Radioheliograph, Proceedings of Nobeyama Symposium 2004, held in Kiyosato, Japan, October 26- 29

Physics

Scientific paper

The interpretation of the nature of solar cycles needs its Hnalysis at all levels of the solar atmosphere. However today brilliant pictures of the solar corona obtained from space laboratories in EUV and X rays are available, no bank of such observations include data necessary for homogeneous analysis of 11-year cycle. The radio data, however, could be the solution of the problem. At present stage, only the Nobeyama radio heliograph is capable to present the necessary information in the form of high quality homogeneous 2D mapping of the whole sun with spatial resolution of about 10 arcsec. The radio maps of the sun at wavelength of 1.76 cm made with the NRH made it possible to investigate the following parameters of the progress of the cycles: - Development of the flocculae/faculae regions at all heliographic latitudes; - Sunspots with the high magnetic field strength at low corona levels; - Magnetic strength and structure of the active regions at the level of the upper chromosphere; - Development of differential rotation of the sun; - Filament and prominence development in the solar cycle; - Quasi-periodic oscillations of the plasma structures of the solar atmosphere; - Neutral line enhancements in ARs reflecting coronal arches structure. In this report the illustrations of the above method of investigation of the solar activity and its development are demonstrated and some samples of analysis of the 11-year solar cycles are shown.

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