C III observable with IUE

Details C III observable with IUE C III observable with IUE

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....75l..17n&link_type=abstract

Astronomy and Astrophysics, vol. 75, no. 3, June 1979, p. L17-L19. Research supported by the Swiss National Science Foundation.

Astronomy and Astrophysics

Astronomy

69

Fine Structure, Planetary Nebulae, Quasars, Satellite Observation, Ultraviolet Spectra, Electron Density (Concentration), Electron Transitions, Emissivity, Ionic Collisions, Iue, Spaceborne Astronomy, Spectral Emission

Scientific paper

Theoretical emissivity ratios are presented for the C III UV multiplets at 977, 1176, 1247, 1908, and 2297 A. Proton-ion collision rates for the relevant transitions are calculated by using the semiclassical impact-parameter method as developed by Sahal-Brechot (1969). IUE observations of these multiplets in the planetary nebula NGC 7027, the slow nova RR Tel, and the quasar Q 1011 plus 25 are discussed, and electron densities are estimated.

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