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The curious conundrum regarding sulfur abundances in planetary nebulae

Henry, R B C; Speck, Angela; Karakas, Amanda; Ferland, Gary J; Maguire, Mason

Description

Sulfur abundances derived from optical emission line measurements and ionization correction factors (ICFs) in planetary nebulae are systematically lower than expected for the objects' metallicities. We have carefully considered a large range of explanations for this "sulfur anomaly," including: (1) correlations between the size of the sulfur deficit and numerous nebular and central star properties, (2) ICFs which undercorrect for unobserved ions, (3) effects of dielectronic recombination on the...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/67696
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/749/1/61

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