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. © 2012 International Astronomical Union.
CITATION STYLE
Henry, R. B. C., Speck, A., Karakas, A. I., & Ferland, G. J. (2011). The curious conundrum regarding sulfur and oxygen abundances in planetary nebulae. In Proceedings of the International Astronomical Union (Vol. 7, pp. 384–385). Cambridge University Press. https://doi.org/10.1017/S1743921312011544
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