Measurements of solar limb darkening in the 1 to 4 micron range

Details Measurements of solar limb darkening in the 1 to 4 micron range Measurements of solar limb darkening in the 1 to 4 micron range

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....59..189k&link_type=abstract

Astronomy and Astrophysics, vol. 59, no. 2, July 1977, p. 189-193. In French.

Astronomy and Astrophysics

Astronomy

13

Atmospheric Models, Infrared Astronomy, Limb Darkening, Solar Atmosphere, Solar Limb, Faculae, Infrared Radiation, Opacity, Optical Correction Procedure, Photosphere, Radiation Measurement

Scientific paper

Radial scans in selected spectral regions near the opacity minimum, in both equatorial and polar directions, have been performed for the purpose of obtaining improved values for the limb darkening of the very undisturbed quiet solar atmosphere. Equipment and correction procedures are described. The new data are compared with earlier values, and the HSRA model is found to be inadequate for predicting values near the opacity minimum. The data are more in accord with the new model M of Vernazza et al. (1976) and also with the BCA model. No pole-equator difference of limb darkening due to the presence of faint faculae was found.

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