2020A&A...641A.135S

Query : 2020A&A...641A.135S

2020A&A...641A.135S - Astronomy and Astrophysics, volume 641A, 135-135 (2020/9-1)

A wide angle view of the Sagittarius dwarf spheroidal galaxy. II. A CEMP-r/s star in the Sagittarius dwarf spheroidal galaxy.

SBORDONE L., HANSEN C.J., MONACO L., CRISTALLO S., BONIFACIO P., CAFFAU E., VILLANOVA S. and AMIGO P.

Abstract (from CDS):

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=4753K, logg=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.

Abstract Copyright: © ESO 2020

Journal keyword(s): galaxies: abundances - galaxies: individual: Sgr dSph - Galaxy: abundances - stars: abundances - stars: chemically peculiar

VizieR on-line data: <Available at CDS (J/A+A/641/A135): alllines.dat allsynth.dat>

Simbad objects: 19

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Number of rows : 19
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1360 4
2 FBMC Sculptor 11 RG* 01 00 16.2940096800 -33 42 37.232341452   18.86 16.995   15.525 C? 20 0
3 WEL 112 * 02 40 04.4134239600 -34 27 11.601236808   19.946 18.37 17.414   K5 16 0
4 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 465 1
5 [VGK2013] J100714.58+160154.5 RG* 10 07 14.5818689784 +16 01 54.577483428           ~ 12 0
6 GrW 170817 GWE 13 09 48.0850 -23 22 53.343           ~ 2003 0
7 NGC 5053 GlC 13 16 27.09 +17 42 00.9     9.96     ~ 620 0
8 NGC 5634 GlC 14 29 37.28 -05 58 35.1   10.69 10.05     ~ 300 0
9 NAME UMi Galaxy G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1360 0
10 V* V4334 Sgr CV* 17 52 32.69352 -17 41 08.0160           F2Ia 373 0
11 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1069 0
12 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2189 2
13 GIU J190734.24-315102.1 * 19 07 34.248 -31 51 02.06     16.742   15.466 ~ 2 0
14 Cl Terzan 7 GlC 19 17 43.92 -34 39 27.8           ~ 428 0
15 Cl Arp 2 GlC 19 28 44.11 -30 21 20.3     12.41     ~ 354 0
16 Cl Terzan 8 GlC 19 41 44.41 -33 59 58.1     11.54     ~ 321 0
17 Cl Pal 12 GlC 21 46 38.84 -21 15 09.4     11.89     ~ 516 0
18 BPS BS 17569-0049 Pe* 22 04 58.3605927288 +04 01 32.135832984 14.503 14.263 13.126 13.122 12.259 ~ 34 0
19 NAME Local Group GrG ~ ~           ~ 8393 0

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