On the facular contrast near the solar limb

Details On the facular contrast near the solar limb On the facular contrast near the solar limb

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...299.1047l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 299, Dec. 15, 1985, p. 1047-1050.

Astronomy and Astrophysics

Astrophysics

17

Faculae, Solar Limb, Spectral Energy Distribution, Stellar Spectrophotometry, Annual Variations, Radiant Flux Density

Scientific paper

Libbrecht and Kuln (1984) have conducted measurements of the continuum contrast of solar faculae in wavelength bands centered at 800 and 525 nm. Some of the obtained results did not agree with observations reported by Chapman and Klabunde (1982). The present paper has the objective to provide new data, taking into account a demonstration of a procedure for obtaining the facular contrast near the solar limb on the basis of a simple analysis. The findings confirm the results of Libbrecht and Kuln that the contrast in the region near the extreme solar limb decreases with decreasing distance to the limb. Attention is given to exposed limbs and flux ratios for three occulting disks, seasonal average normalized flux profiles Delta F/I for the three disks in two colors, and excess facular signal Delta F/I plotted for various disks using 1984 data.

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