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The abundances of neon, sulfur, and argon in planetary nebulaeNew 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.
Document ID
19820031610
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Beck, S. C.
(California Univ. Berkeley, CA, United States)
Lacy, J. H.
(California Univ. Berkeley, CA, United States)
Townes, C. H.
(California, University Berkeley, CA, United States)
Aller, L. H.
(California, University Los Angeles, CA, United States)
Geballe, T. R.
(Mount Wilson and Las Campanas Observatories Pasadena, CA, United States)
Baas, F.
(Leiden, Rijksuniversiteit, Sterrewacht Leiden, Netherlands)
Date Acquired
August 10, 2013
Publication Date
October 15, 1981
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Accession Number
82A15145
Funding Number(s)
CONTRACT_GRANT: NGL-05-003-272
CONTRACT_GRANT: NSF AST-77-21022
CONTRACT_GRANT: NSF AST-78-24453
Distribution Limits
Public
Copyright
Other

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