Nonfacular solar luminosity variations

Details Nonfacular solar luminosity variations Nonfacular solar luminosity variations

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...381l..35k&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 381, Nov. 1, 1991, p. L35-L37.

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58

Faculae, Irradiation, Solar Activity Effects, Solar Limb, Stellar Luminosity, Astronomical Photometry, Solar Radiation, Sunspot Cycle

Scientific paper

Solar limb photometry data obtained in 1990 shows a decline in the active region facular contribution to the solar irradiance from the previous year - in accord with the maximum in the sunspot cycle occurring in late 1989. In contrast, the nonfacular and nonsunspot contribution to the solar flux increased compared to 1989. This third component of the irradiance variation is consistent with a significant increase in the total mean solar irradiance from the value observed near the time of sunspot maximum. Evidently, the irradiance maximum, like other solar activity indices, exhibits a phase lag with respect to the solar activity maximum as measured by the sunspot number.

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