Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.193..911c&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 193, Dec. 1980, p. 911-919.
Astronomy and Astrophysics
Astronomy
43
Astronomical Spectroscopy, Electron Density (Concentration), Electron Energy, Forbidden Transitions, Planetary Nebulae, Line Spectra, Orion Nebula, Oxygen Spectra, Reaction Kinetics, Sulfur
Scientific paper
Forbidden line intensity ratios for S II and O II due to collisional de-excitation are discussed. Comparison is made between various reaction rate parameters presented by separate investigators. Included are observations of ratios obtained from the Orion nebula which experimentally confirm the reaction rates of Pradhan as best representing the observed distribution of these ratios. Forbidden O II and forbidden S II contour plots are also presented, which allow effective electron temperatures and densities to be estimated from pairs of line ratios.
Cantó Jorge
Elliott K. H.
Meaburn John
Theokas A. C.
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