Spectrophotometry of planetary nebulae. III. IIDS observations of compact nebulae

James B. Kaler, Karen B. Kwitter, Richard A. Shaw, Louise Browning

Research output: Contribution to journalArticlepeer-review


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 (Ha 3-75, He 2-15, K 3-89, M 1-16, M 2-52, and M 3-28) 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 in the relation, as N-rich nebulae can be unenriched in He and vice versa.

Original languageEnglish (US)
Pages (from-to)980-985
Number of pages6
JournalPublications of the Astronomical Society of the Pacific
Issue number729
StatePublished - Nov 1996

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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