Spectrophotometry of Planetary Nebulae. III. IIDS Observations of Compact Nebulae
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)
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- November 1996
- DOI:
- 10.1086/133823
- Bibcode:
- 1996PASP..108..980K
- Keywords:
-
- PLANETARY NEBULAE: GENERAL;
- ISM: ABUNDANCES