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.
|Title of host publication||Planetary Nebulae: An Eye to the Future|
|Number of pages||2|
|Publication status||Published - Jul 2011|
|Name||Proceedings of the International Astronomical Union|
- AGB and post-AGB stars
- planetary nebulae