Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.197..647a&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 197, Nov. 1981, p. 647-658. No. AST-80-19436;
Astronomy and Astrophysics
Astronomy
22
Chemical Composition, Nuclear Fusion, Planetary Nebulae, Spectrum Analysis, Ultraviolet Astronomy, Astronomical Models, Carbon, Iue, Line Spectra, Nitrogen, Oxygen, Plasma Diagnostics
Scientific paper
Spectroscopic observations made with the Anglo-Australian Telescope are combined with IUE data to provide material for a theoretical analysis of NGC 2867. Except for the S II forbidden line, line intensities in the optical region can be represented reasonably well by a simple theoretical model based on Balick's (1975) work. The model is used to assess temperatures in strata of higher ionization where no good spectroscopic diagnostic criteria are available and to derive ionization correction factors to account for unobserved stages of ionization. The derived chemical composition is compared with that of the sun and other planetaries. NGC 2867 shows no significant abundance peculiarities or abnormalities.
Aller Lawrence H.
Keyes Charles D.
Omara B. J.
Ross John E.
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