Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...406..350k&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 406, no. 1, p. 350-353.
Astronomy and Astrophysics
Astrophysics
12
Electron Transitions, Emission Spectra, Metallicity, Solar Flares, Iron, Line Spectra, Oso-5
Scientific paper
Electron impact excitation rates, calculated with a relativistic version of the R-matrix code, are presented for all transitions among the 2s2, 2s2p, and 2p2 levels of Fe XXIII. These data are used to derive theoretical T(e) sensitive emission-line ratios involving Fe XXIII transitions in the 132-1100 A wavelength range. A comparison of our theoretical results for the ratio R1 = I(2s2 1S-2s2p 1P)/I(2s2 1 1S-2s2p 3Pi) = I(132.81 A)/I(263.79 A) with the observed value for a solar flare, obtained with the Goddard Space Flight Center's grating spectrometer on the OSO 5 satellite, reveals good agreement between theory and observation. This provides some experimental support for the accuracy of the atomic data adopted in the line ratio calculations.
Boone A. W.
Conlon E. S.
Keenan Francis P.
Norrington Patrick H.
Warren G. A.
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