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Title:
Sulfur, Chlorine, and Argon Abundances in Planetary Nebulae. IIB. Abundances in a Southern Sample
Authors:
Milingo, J. B.; Henry, R. B. C.; Kwitter, K. B.
Affiliation:
AA(Department of Physics, Gettysburg College, Gettysburg, PA 17325; ), AB(Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019; ), AC(Department of Astronomy, Williams College, Williamstown, MA 01267; )
Publication:
The Astrophysical Journal Supplement Series, Volume 138, Issue 2, pp. 285-296. (ApJS Homepage)
Publication Date:
02/2002
Origin:
UCP
ApJ Keywords:
ISM: Abundances, Nuclear Reactions, Nucleosynthesis, Abundances, ISM: Planetary Nebulae: General, Stars: Evolution
DOI:
10.1086/324292
Bibliographic Code:
2002ApJS..138..285M

Abstract

We have undertaken a large spectroscopic survey of over 80 planetary nebulae with the goal of providing a homogeneous spectroscopic database between 3600 and 9600 Å, as well as a set of consistently determined abundances, especially for oxygen, sulfur, chlorine, and argon. In the current paper we calculate and report the S/O, Cl/O, and Ar/O abundance ratios for 45 southern planetary nebulae (predominantly type II), using our own recently observed line strengths published in a companion paper. One of the salient features of our work is the use of the near-IR lines of [S III] λλ9069, 9532 coupled with the [S III] temperature, to determine the S+2 ionic abundance. We find the following average abundances for these objects: S/O=0.011+/-0.0064, Cl/O=0.00031+/-0.00012, and Ar/O=0.0051+/-0.0020.

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Part 1     Part  3     Part  2     Part  4    

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