Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apjs...31..417d&link_type=abstract
Astrophysical Journal Supplement Series, vol. 31, July 1976, p. 417-443. NASA-supported research.
Astronomy and Astrophysics
Astronomy
204
Line Spectra, Solar Limb, Solar Spectra, Spaceborne Astronomy, Ultraviolet Spectra, Emission Spectra, Skylab Program, Spectroheliographs
Scientific paper
Spectra of a quiet solar region obtained at positions within and above the solar white-light limb in the wavelength region from 1175 to 1940 A are discussed. The spectra were obtained by the slit spectrograph (SO82-B) on Skylab. The spectral resolution is 0.06 A, and the projected slit area on the sun was 2 x 60 arcsec (1450 x 43500 km). Relative line intensities are presented for lines formed in the temperature region of the solar atmosphere from about 8000 to 220,000 K. Representative line profiles of both optically thin and optically thick lines are shown as a function of height above the limb. Random mass-motion velocities are deduced from the optically thin lines, and the relative intensities and profiles of the lines are discussed in terms of current theoretical models. A wavelength list with identifications is given for the spectrum obtained at +4 arcsec above the white-light limb.
Bartoe John-David F.
Doschek George A.
Feldman Uri
Vanhoosier Michael E.
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