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Title:
Spectrophotometry of Planetary Nebulae. III. IIDS Observations of Compact Nebulae
Authors:
Kaler, James B.; Kwitter, Karen B.; Shaw, Richard A.; Browning, Louise
Publication:
Publications of the Astronomical Society of the Pacific, v.108, p.980-985 (PASP Homepage)
Publication Date:
11/1996
Origin:
PASP
PASP/ApJ Keywords:
PLANETARY NEBULAE: GENERAL, ISM: ABUNDANCES
DOI:
10.1086/133823
Bibliographic Code:
1996PASP..108..980K

Abstract

We give spectral line intensities, electron temperatures, electron densities, and chemical compositions for 25 compact planetary nebulae observed with the IIDS at Kitt Peak. Several (Ha3-75, He2-15, K3-89, M1-16, M2-52, and M3-28) are found to be especially rich in helium and/or nitrogen (He/H > 0.15; N/O > 1). The results minimally confirm the correlation between N/O and He/H, but also confirm the intrinsic scatter int eh relation, as N-rich nebulae can be unenriched in He and vice versa. (SECTION: Interstellar Medium and Nebulae)

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