The curious conundrum regarding sulfur and oxygen abundances in planetary nebulae

RBC Henry, A Speck, AI Karakas… - Proceedings of the …, 2011 - cambridge.org
Proceedings of the International Astronomical Union, 2011cambridge.org
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.
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.
Cambridge University Press