The abundances of neon, sulfur, and argon in planetary nebulae

Details The abundances of neon, sulfur, and argon in planetary nebulae The abundances of neon, sulfur, and argon in planetary nebulae

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...249..592b&link_type=abstract

Astrophysical Journal, Part 1, vol. 249, Oct. 15, 1981, p. 592-601.

Astronomy and Astrophysics

Astronomy

67

Abundance, Argon, Infrared Spectra, Neon, Planetary Nebulae, Sulfur, Astronomical Models, Infrared Astronomy, Ion Density (Concentration), Line Spectra, Stellar Spectra

Scientific paper

New infrared observations of Ne II, Ar III, and S IV are used in optical observations of other ionization states of the considered elements to evaluate the abundances of neon, argon, and sulfur in 18 planetary nebulae. Attention is also given to one or more of the infrared lines in 18 other nebulae. It is pointed out that S IV was detected in approximately 90% of the observed objects, while Ar III was found in about 80%, and Ne II in roughly one-third. It is noted that optical observations typically include only a limited region of the nebula, while the infrared measurements frequently involve integration over the entire nebular image.

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