The curious conundrum regarding sulfur and oxygen abundances in planetary nebulae

Richard B.C. Henry, Angela Speck, Amanda I. Karakas, Gary J. Ferland

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


We carefully consider numerous explanations for the sulfur abundance anomaly in planetary nebulae. No one rationale appears to be satisfactory, and we suggest that the ultimate explanation is likely to be a heretofore unidentified feature of the nebular gas which significantly impacts the sulfur ionization correction factor.

Original languageEnglish
Title of host publicationPlanetary Nebulae
Subtitle of host publicationAn Eye to the Future
EditorsArturo Manchado, Letizia Stanghellini, Detlef Schonberner
Number of pages2
StatePublished - Jul 2011

Publication series

NameProceedings of the International Astronomical Union
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221

Bibliographical note

Funding Information:
We gratefully acknowledge support from the US-NSF (RBCH, GJF) and the NCI National Facility at the Australian National University (AIK). We also thank Matthew Hosak for computing the photoionization models and Karen Kwitter for the use of her PN database.


  • AGB and post-AGB stars
  • abundances
  • planetary nebulae

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science


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