Calcium plage intensity and solar irradiance variations

Details Calcium plage intensity and solar irradiance variations Calcium plage intensity and solar irradiance variations

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991soph..133..205v&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 133, June 1991, p. 205-213.

Physics

6

Calcium, Metallicity, Solar Activity Effects, Solar Radiation, Faculae, Perturbation Theory, Sunspot Cycle

Scientific paper

A statistical relation is established between the facular contribution to the solar irradiance and the intensity of the associated calcium plage. For the solar irradiance data the ACRIM measurements were used. The quiet-sun level of the irradiance was determined as a function of the time for the period studied. A sample of plages in the period of the solar activity minimum was selected, during the periods when no spots were present on the solar disk. The dependence studied is expressed through the parameter C(p) in the 'proxy' PFI concept. The parameter C(p) could be related to the plage intensity (I) as C(p) = 0.006I + 0.003. The mean value of the parameter C(p) ranged between 0.015 and 0.017 depending on the choice of samples.

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