Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..33..239m&link_type=abstract
Astrophysics and Space Science, vol. 33, Mar. 1975, p. 239-243.
Astronomy and Astrophysics
Astrophysics
7
Chromosphere, Compton Effect, Red Shift, Solar Spectra, Light Scattering, Line Spectra, Optical Thickness, Scattering Cross Sections, Solar Limb
Scientific paper
It is found that agreement can be reached between theoretical calculations and experimental observations of the difference of the redshift at the solar limb minus the redshift at the center of the disk. It is assumed that the lines of the solar spectrum formed in the reversing layer are subjected to a redshift due to multiple Compton scattering when traveling for an optical thickness of less than 1 in the chromosphere. A simple model consisting of spherical shells of constant densities is used for calculating the optical thickness of the chromosphere, and the wavelength shift is obtained using Chandrasekhar's formula for the intensity of a spectral line after passage through the chromosphere. The results show that the theory of multiple Compton scattering agrees with observations of the limb effect.
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