Theoretical emission line ratios for SI XIII compared to solar observations

Details Theoretical emission line ratios for SI XIII compared to solar observations Theoretical emission line ratios for SI XIII compared to solar observations

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..112...83m&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 112, no. 1, 1987, p. 83-88. SERC-supported research.

Physics

4

Electron Energy, Electron Transitions, Emission Spectra, Line Spectra, Silicon, Stellar Models, Electron Scattering, Ratios, Stellar Spectrophotometry

Scientific paper

Using the data of Keenan et al. (1987), Si XIII emission line ratios were calculated for a range of electron temperatures and densities appropriate to the solar corona. Results are compared with those solar flare observations obtained with the SOLEX A spectrometer on board the P78-1 satellite. The results demonstrate the effect of dielectronic and radiative recombinations, as well as inner shell ionization, on this line ratio. A theoretical electron temperature sensitive ratio (f + i)/r of 0.70 is found, where i, f, and r are the intercombination (1s2 1S-1s2P 3P1,2), forbidden (1s2 1S-1s2s 3S), and resonance (1s2 1S-1s2p 1P) transitions respectively.

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