Sulphur abundances in metal-poor stars

Details Sulphur abundances in metal-poor stars Sulphur abundances in metal-poor stars

2005-09-07

arxiv.org/abs/astro-ph/0509161v2

Astronomy and Astrophysics

Astrophysics

accepted by A&A, 4 pages, 3 tables, 1 figure; v2: Table2 updated with metallicities from other works

Scientific paper

10.1051/0004-6361:20053569

We investigate the debated "sulphur discrepancy" found among metal-poor stars of the Galactic halo with [Fe/H] < -2. This discrepancy stems in part from the use of two different sets of sulphur lines, the very weak triplet at 8694-95 A and the stronger triplet lines at 9212 - 9237 A. For three representative cases of metal-poor dwarf, turnoff and subgiant stars, we argue that the abundances from the 8694-95 lines have been overestimated which has led to a continually rising trend of [S/Fe] as metallicity decreases. Given that the near-IR region is subject to CCD fringing, these weak lines become excessively difficult to measure accurately in the metallicity regime of [Fe/H] < -2. Based on homogeneously determined spectroscopic stellar parameters, we also present updated [S/Fe] ratios from the 9212-9237 lines which suggest a plateau-like behaviour similar to that seen for other alpha elements.

Affiliated with

Also associated with

No associations

Rating

Sulphur abundances in metal-poor stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Sulphur abundances in metal-poor stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sulphur abundances in metal-poor stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-216298