TY - JOUR
T1 - A wide angle view of the Sagittarius dwarf spheroidal galaxy
T2 - II. A CEMP-r/s star in the Sagittarius dwarf spheroidal galaxy
AU - Sbordone, L.
AU - Hansen, C. J.
AU - Monaco, L.
AU - Cristallo, S.
AU - Bonifacio, P.
AU - Caffau, E.
AU - Villanova, S.
AU - Amigo, P.
N1 - Funding Information:
Acknowledgements. This paper is dedicated to the dear memory of the late Fiorella Castelli, whose work in the modeling and analysis of stellar atmospheres has been a fundamental guidance for us. The authors thank Diego Vescovi for help in the use of the SKYNET code. EC and PB gratefully acknowledge support from the French National Research Agency (ANR) funded project “Pristine” (ANR-18-CE31-0017). EC and PB are thankful to ESO - Santi-
Funding Information:
ago for hosting them during the preparation of this manuscript. SV gratefully acknowledges the support provided by Fondecyt reg. n. 1170518. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/ gaia/dpac/consortium). This work has made use of data from APOGEE, part of SDSS IV. The SDSS web site is www.sdss.org.
Publisher Copyright:
© 2020 ESO.
PY - 2020/9/1
Y1 - 2020/9/1
N2 - 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.
AB - 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.
KW - Galaxies: abundances
KW - Galaxies: individual: Sgr dSph
KW - Galaxy: abundances
KW - Stars: abundances
KW - Stars: chemically peculiar
UR - http://www.scopus.com/inward/record.url?scp=85092432481&partnerID=8YFLogxK
U2 - 10.1051/0004-6361/202037908
DO - 10.1051/0004-6361/202037908
M3 - Article
AN - SCOPUS:85092432481
SN - 0004-6361
VL - 641
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A135
ER -