Time profiles of solar irradiance dips

Details Time profiles of solar irradiance dips Time profiles of solar irradiance dips

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..125...13v&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 125, Jan. 1990, p. 13-24.

Physics

3

Irradiance, Solar Radiation, Faculae, Radiation Distribution, Sunspots, Time Dependence

Scientific paper

ACRIM data have been analyzed to study the time profiles of simple irradiance dips caused by single active regions. Comparison of the average characteristics of the dips appearing in the minimum and maximum of the solar cycle shows that there are no significant differences. In both periods there is disclosed facular irradiance excess in the profile wings having a typical duration of two to three days and an amplitude of about 20 percent of the dip amplitude. The profiles are asymmetric, with a stronger and longer excess in the trailing wing. An 'average' profile is determined which is attributed to an idealized active region, and the luminosity perturbation caused by it is calculated.

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