Coronal line intensity as an integrated index of solar activity

Details Coronal line intensity as an integrated index of solar activity Coronal line intensity as an integrated index of solar activity

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.

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