Abstract
view Abstract Citations (19) References (44) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The He II 1640 Angstrom Multiplet Observed from Solar Prominences Laming, J. M. ; Feldman, U. Abstract We describe an analysis of EUV spectra of solar prominences taken with the SO82-B instrument on Skylab, with special attention to the 1640 A 2l-3l arcmin multiplet of He II. It appears that the line intensities emitted from plasma at temperatures between 2 x 10 exp 4 and 4 x 10 exp 4 K can be explained by an ionization equilibrium model, incorporating photoexcitation and photoionization by incident radiation from the solar disk. With this interpretation, the data are consistent with an abundance for He of 0.1 relative to H. Some problems remain, however, in predicting the relative intensities of the components of the 1640 A multiplet. Publication: The Astrophysical Journal Pub Date: January 1993 DOI: 10.1086/172214 Bibcode: 1993ApJ...403..434L Keywords: Solar Prominences; Solar Spectra; Ultraviolet Spectra; Abundance; Emission Spectra; Skylab Program; Solar Atmosphere; Solar Physics; ATOMIC PROCESSES; SUN: ABUNDANCES; SUN: PROMINENCES; SUN: UV RADIATION full text sources ADS | Related Materials (1) Erratum: 1993ApJ...409..869L
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