Sulfur, Chlorine, & Argon Abundances in Planetary Nebulae. IIB: Abundances in a Southern Sample

Details Sulfur, Chlorine, & Argon Abundances in Planetary Nebulae. IIB: Abundances in a Southern Sample Sulfur, Chlorine, & Argon Abundances in Planetary Nebulae. IIB: Abundances in a Southern Sample

2001-09-10

arxiv.org/abs/astro-ph/0109161v1

Astrophys.J.Suppl. 138 (2002) 285-296

Astronomy and Astrophysics

Astrophysics

25 pages, including 2 figures. Accepted for publication in the Astrophysical Journal Supplements. See also astro-ph/0106213 fo

Scientific paper

10.1086/324292

We have undertaken a large spectroscopic survey of over 80 planetary nebulae with the goal of providing a homogeneous spectroscopic database between 3600-9600 Angstroms, 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 an earlier paper. One of the salient features of our work is the use of the NIR lines of [S III] 9069,9532 coupled with the [S III] temperature, to determine the S++ 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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