SIMBAD references

2005A&A...441..533C - Astronomy and Astrophysics, volume 441, 533-548 (2005/10-2)

Sulphur abundance in Galactic stars.

CAFFAU E., BONIFACIO P., FARAGGIANA R., FRANCOIS P., GRATTON R.G. and BARBIERI M.

Abstract (from CDS):

We investigate sulphur abundance in 74 Galactic stars by using high resolution spectra obtained at ESO VLT and NTT telescopes. For the first time the abundances are derived, where possible, from three optical multiplets: Mult. 1, 6, and 8. By combining our own measurements with data in the literature we assemble a sample of 253 stars in the metallicity range -3.2≲[Fe/H]≲+0.5. Two important features, which could hardly be detected in smaller samples, are obvious from this large sample: 1) a sizeable scatter in [S/Fe] ratios around [Fe/H]~-1; 2) at low metallicities we observe stars with [S/Fe]∼0.4, as well as stars with higher [S/Fe] ratios. The latter do not seem to be kinematically different from the former ones. Whether the latter finding stems from a distinct population of metal-poor stars or simply from an increased scatter in sulphur abundances remains an open question.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: population II - stars: kinematics - stars: atmospheres - Galaxy: halo - Galaxy: evolution

Simbad objects: 283

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2019.09.16-05:01:32

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