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  • SPACE SCIENCES  (2)
  • 1
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    Non-LTE profiles of the Al I autoionization lines (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A non-LTE formulation is given for the transfer of radiation in the autoionizing lines of neutral aluminum at 1932 and 1936 A through both the Bilderberg and Harvard-Smithsonian model atmospheres. Numerical solutions for the common source function of these lines and their theoretical line profiles are calculated and compared with the corresponding LTE profiles. The results show that the non-LTE profiles provide a better match with the observations. They also indicate that the continuous opacity of the standard solar models should be increased in this wavelength region if the center-limb variations of observed and theoretical profiles of these lines are to be in reasonable agreement.
    Keywords: SPACE SCIENCES
    Type: Solar Physics; 34; Jan. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Theoretical intensity ratios for some Fe XIII coronal lines. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Using cross section values for collisional excitation by protons recently calculated by Landman (1973), theoretical values for the relative intensities of the Fe XIII 10747-, 10798-, and 3388-A lines are determined as functions of electron density. The obtained results are compared with those of Chevalier and Lambert (1969).
    Keywords: SPACE SCIENCES
    Type: Solar Physics; 30; June 197
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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