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On the Origin of Sulfur | | Nils Ryde
; David L. Lambert
; | | Date: |
5 Oct 2005 | | Journal: | ASP Conference Series, Vol. 336, p 355 (2005) | | Subject: | astro-ph | | Abstract: | We present our work on the halo evolution of sulfur, based on observations of the S I lines around 9220 A for ten stars for which the S abundance was obtained previously from much weaker S I lines at 8694 A. We cannot confirm the rise and the high [S/Fe] abundances for low [Fe/H], as claimed in the literature from analysis of the 8694 A lines. The reasons for claims of an increase in [S/Fe] with decreasing [Fe/H] are probably twofold: uncertainties in the measurements of the weak 8694 A lines, and systematic errors in metallicity determinations from Fe I lines. The near-infrared sulfur triplet at 9212.9, 9228.1, and 9237.5 A are preferred for an abundance analysis of sulfur for metal-poor stars. Our work was presented in full by Ryde & Lambert (2004). | | Source: | arXiv, astro-ph/0510136 | | Services: | Forum | Review | PDF | Favorites | |
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