Solar coronal Ar/Fe and Ne/Mg abundance ratios derived from ultraviolet forbidden line spectra

Details Solar coronal Ar/Fe and Ne/Mg abundance ratios derived from ultraviolet forbidden line spectra Solar coronal Ar/Fe and Ne/Mg abundance ratios derived from ultraviolet forbidden line spectra

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...358..338d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 358, July 20, 1990, p. 338-343.

Astronomy and Astrophysics

Astrophysics

8

Abundance, Line Spectra, Solar Corona, Solar Spectra, Ultraviolet Spectra, Argon, Forbidden Bands, Iron, Magnesium, Neon, Spectrographs

Scientific paper

An Ar/Fe abundance ratio of 0.031 + or - 35 percent and an upper limit of 0.4 to the Ne/Mg abundance ratio are determined for solar coronal active regions using solar spectra. Forbidden lines occur at 1324.45 A for Mg V, 1349.38 A for Fe XII, 1375.98 A for Ca XV, and 1392.12 A for Ar XI. The unobserved Ne V line is predicted to fall at 1574.68 A. These abundance ratios are consistent with lower abundances of Ne and Ar in the corona relative to low first ionization potential elements.

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