Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...282..776s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 282, July 15, 1984, p. 776-783.
Astronomy and Astrophysics
Astrophysics
61
Chromosphere, Faculae, K Lines, Solar Activity, Limb Darkening, Solar Cycles, Solar Granulation, Solar Magnetic Field, Solar Spectra
Scientific paper
A three-component model of the solar cycle variability of the Ca II K emission is developed using extant contrast and fractional area parameters for (1) cell, (2) network, and (3) plage components that are resolution-consistent. A fit has been achieved for the quiet-sun Ca II K emission (at solar minimum) as observed by White and Livingston (1981) with cell and network features alone using extant limb-darkening laws. The occurrence of plages during the growth of the solar cycle was found to be insufficient to account for the cycle increase in the K emission and required the introduction of additional network in excess of the quiet-sun value. The implications of, and evidence for, such an active network are discussed.
Lean Judith L.
Livingston William Charles
Skumanich Andrew
White Oran Richard
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