An approximate calculation of the effect of opacity in the solar spectral lines of C III

Details An approximate calculation of the effect of opacity in the solar spectral lines of C III An approximate calculation of the effect of opacity in the solar spectral lines of C III

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.193..947d&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 193, Dec. 1980, p. 947-955. Research supported by the Northern Ireland

Physics

Optics

35

Atmospheric Optics, Opacity, Optical Thickness, Solar Atmosphere, Solar Spectra, Abundance, Carbon, Emission Spectra, Line Spectra

Scientific paper

The paper applies the fact that the intensity ratio between two spectral lines arising from the same upper level can depend on opacity, to determine the optical thickness of the solar atmosphere to C III radiation. The analysis is based on observations taken near the sun's limb during the Skylab mission with the Naval Research Laboratory's spectrograph. By introducing the measured abundance of carbon and the results of ionization balance calculations, an estimate is made of the line-of-sight physical thickness of the regions emitting C III lines at the disk center.

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