Sulfur and Argon Abundances in Type II Planetary Nebulae

Details Sulfur and Argon Abundances in Type II Planetary Nebulae Sulfur and Argon Abundances in Type II Planetary Nebulae

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.1505m&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #15.05; Bulletin of the American Astronomical Society, Vol. 30, p.1275

Astronomy and Astrophysics

Astronomy

Scientific paper

Abundances of S and Ar are presented for a sample of 48 Type II southern planetary nebulae (PN) based upon newly acquired spectrophotometry extending from 3600-9600 Angstroms. Measurements of the strengths of [S III] 9069 Angstroms and 9532 Angstroms in each object has enabled us to improve upon earlier sulfur abundance estimates for these objects, since a significant portion of S in PN exists in the S(+2) ionization stage, thus rendering extrapolation from observed ion abundances to total elemental abundance more certain. Type II PN reside close to the Galactic disk and are free of self-contamination, and thus their S and Ar abundances in particular are expected to reflect levels of these elements in the interstellar medium at the time of PN progenitor formation. Improved S and Ar abundances provide important information for studying massive star yields of these two elements as well as their distributions across the Milky Way disk.

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