Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.164..117x&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 164, no. 1, Feb. 1990, p. 117-130.
Astronomy and Astrophysics
Astrophysics
4
Solar Activity, Solar Corona, Solar Spectra, Emission Spectra, Solar Magnetic Field, Solar Wind, Visible Spectrum
Scientific paper
The relation between coronal green line intensity and high-speed streams of solar wind emitted by coronal holes or by loop structures of the corona is studied. Other factors of solar activity have been taken into account in this relation, such as proton events, sunspot number, faculae, and solar magnetic fields. Although the investigated time period (1964-1974) is very short, because of lack of data, an effort is made to define the intensity of the coronal green line as an integrated index of the solar activity which can express all the photospheric and coronal phenomena of the sun. The contraction of the low-density coronal-hole regions and the presence of bright loops during solar maximum provide a theoretical explanation of the above-mentioned relation.
Mavromichalaki Helen
Petropoulos Basil
Xanthakis John
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