Line ratios for O VII

Details Line ratios for O VII Line ratios for O VII

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203p..31d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 203, May 1983, p. 31P-34P.

Astronomy and Astrophysics

Astronomy

16

Atomic Excitations, Forbidden Transitions, Oxygen Spectra, Resonance Lines, Solar Spectra, Solar Wind, Atomic Collisions, Atomic Energy Levels, Atomic Recombination, Cascades, Electron Density (Concentration), Electron Energy, Electron Transitions, Oxygen Ions, Resonance Scattering

Scientific paper

New theoretical rates for electron excitation of the transitions 11S-23S and 11S-23P in O VII are used to calculate the line ratios R0 (forbidden line to intercombination line) and G0 (forbidden plus intercombination lines to resonance line). The authors' theoretical value of R0 are slightly larger than earlier calculations but their values of G0 are significantly lower than the earlier calculations. With their results the value of G0 = 1.0, from the solar observations of McKenzie & Landecker, would predict an electron temperature of 2.0×106K, which is in good agreement with the temperature of 1.8×106K predicted by recombination-ionization equilibrium calculations.

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