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Author Sbordone, L.; Hansen, C.J.; Monaco, L.; Cristallo, S.; Bonifacio, P.; Caffau, E.; Villanova, S.; Amigo, P.
Title A wide angle view of the Sagittarius dwarf spheroidal galaxy II. A CEMP-r/s star in the Sagittarius dwarf spheroidal galaxy Type
Year 2020 Publication Astronomy & Astrophysics Abbreviated Journal Astron. Astrophys.
Volume 641 Issue Pages 9 pp
Keywords galaxies: abundances; galaxies: individual: Sgr dSph; Galaxy: abundances; stars: abundances; stars: chemically peculiar
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 (T-eff=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.
Address [Sbordone, L.] ESO European Southern Observ, Alonso Cordova 3107, Santiago, Chile, Email: lsbordon@eso.org
Corporate Author Thesis
Publisher Edp Sciences S A Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1432-0746 ISBN Medium
Area Expedition Conference
Notes WOS:000574599400004 Approved
Call Number UAI @ alexi.delcanto @ Serial 1239
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