Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...80..425b&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 80, no. 1, May 1992, p. 425-452.
Astronomy and Astrophysics
Astrophysics
114
Astronomical Spectroscopy, Carbon, Emission Spectra, Infrared Spectra, Molecular Excitation, Ultraviolet Spectra, Electron Impact, Electron Transitions, Ground State, Nitrogen, Oxygen
Scientific paper
New and improved collision strengths and Maxwellian-averaged rate coefficients for temperatures between 1000 and 40,000 K are presented for all the prominent transitions in the spectra of C II, N III, and O IV. The collision strengths show extensive autoionization structures that are delineated in detail and which enhance the rate coefficients for several transitions by a considerable amount. Maxwellian-averaged collision strengths are calculated for all possible fine-structure transitions along the states included in the eigenfunction expansion of the target ion. All calculations are carried out in the close-coupling approximation using the R-matrix method as adapted for the Opacity Project.
Blum Robert David
Pradhan Anil Kumar
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