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|Title:||A wide angle view of the Sagittarius dwarf spheroidal galaxy. II. A CEMP-r/s star in the Sagittarius dwarf spheroidal galaxy||Authors:||Sbordone, luca
Hansen, C. J.
|Issue Date:||2020||Journal:||ASTRONOMY & ASTROPHYSICS||Abstract:||We report on the discovery and chemical abundance analysis of the first CEMP-r/s star detected in the Sagittarius dwarf spheroidal galaxy (Sgr dSph) by means of UVES high-resolution spectra. The star, found in the outskirts of Sgr dSph, along the major axis of the main body, is a moderately metal-poor giant (Teff = 4753 K, log g = 1.75, [Fe/H] = -1.55) with [C/Fe] = 1.13, placing it in the so-called "high-carbon band", and strong s-process and r-process enrichment ([Ba/Fe] = 1.4, [Eu/Fe] = 1.01). Abundances of 29 elements from C to Dy were obtained. The chemical pattern appears to be best fitted by a scenario where an r-process pollution event pre-enriched the material out of which the star was born as secondary in a binary system whose primary evolved through the AGB phase, providing C- and s-process enrichment.||URI:||http://hdl.handle.net/20.500.12386/29922||URL:||https://www.aanda.org/articles/aa/abs/2020/09/aa37908-20/aa37908-20.html||ISSN:||0004-6361||DOI:||10.1051/0004-6361/202037908||Bibcode ADS:||2020A&A...641A.135S||Fulltext:||embargo_20210922|
|Appears in Collections:||1.01 Articoli in rivista|
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