Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.207p..51k&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 207, April 1, 1984, p. 51P-54P. Research supported by t
Astronomy and Astrophysics
Astronomy
22
Collision Rates, Line Spectra, Magnesium, Solar Spectra, Electron Energy, Electron Scattering, Electron Transitions, Emission Spectra
Scientific paper
The recent R-matrix calculations of the 1(1)S-2(3)S and 1(1)S-2(3)P electron excitation collision rates in Mg XI by Tayal and Kingston (1984) are used to determine the ratio R of the forbidden to the intercombination line and the ratio G of the forbidden plus intercombination lines to the resonance line. These ratios are respectively electron density and temperature sensitive. Values for R very similar to those deduced by Wolfson et al. (1983), Pradhan and Shull (1981), and Pradhan (1982) are found. The results for G, however, are 25-30 percent smaller than those calculated by these authors. The theoretical value of G at the temperature of maximum emission is now in excellent agreement with that observed for the November 5, 1980 flare by the SMM satellite.
Keenan Francis P.
Kingston A. E.
Tayal Swaraj S.
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