2014A&A...572A.108T


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.17CEST03:34:52

2014A&A...572A.108T - Astronomy and Astrophysics, volume 572A, 108-108 (2014/12-1)

The chemical composition of red giants in 47 Tucanae. I. Fundamental parameters and chemical abundance patterns.

THYGESEN A.O., SBORDONE L., ANDRIEVSKY S., KOROTIN S., YONG D., ZAGGIA S., LUDWIG H.-G., COLLET R., ASPLUND M., VENTURA P., D'ANTONA F., MELENDEZ J. and D'ERCOLE A.

Abstract (from CDS):

The study of chemical abundance patterns in globular clusters is key importance to constraining the different candidates for intracluster pollution of light elements. We aim at deriving accurate abundances for a wide range of elements in the globular cluster 47 Tucanae (NGC 104) to add new constraints to the pollution scenarios for this particular cluster, expanding the range of previously derived element abundances. Using tailored 1D local thermodynamic equilibrium (LTE) atmospheric models, together with a combination of equivalent width measurements, LTE, and NLTE synthesis, we derive stellar parameters and element abundances from high-resolution, high signal-to-noise spectra of 13 red giant stars near the tip of the RGB. We derive abundances of a total 27 elements (O, Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Mo, Ru, Ba, La, Ce, Pr, Nd, Eu, Dy). Departures from LTE were taken into account for Na, Al, and Ba. We find a mean [Fe/H]=-0.78±0.07 and [α/Fe]=0.34±0.03 in good agreement with previous studies. The remaining elements show good agreement with the literature, but including NLTE for Al has a significant impact on the behavior of this key element. We confirm the presence of an Na-O anti-correlation in 47 Tucanae found by several other works. Our NLTE analysis of Al shifts the [Al/Fe] to lower values, indicating that this may be overestimated in earlier works. No evidence of an intrinsic variation is found in any of the remaining elements.

Abstract Copyright:

Journal keyword(s): globular clusters: individual: 47 Tucanae - stars: abundances - stars: fundamental parameters - methods: observational - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/A+A/572/A108): table1.dat table2.dat table5.dat table8.dat table9.dat>

Nomenclature: Table 1: [TSA2014] NNNN N=13 among (Nos 1062-40394).

Simbad objects: 28

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Number of rows : 28

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 2MASS J00220669-7207156 RG* 00 22 06.6922282769 -72 07 15.766948853 15.0 13.8 12.55   11.23 ~ 7 0
2 2MASS J00220714-7200328 RG* 00 22 07.1537773447 -72 00 32.822717001 15.2 13.9 12.57   11.19 ~ 14 0
3 2MASS J00223025-7201409 RG* 00 22 30.2654814226 -72 01 41.017654309 15.4 13.6 11.98   10.4 ~ 8 0
4 2MASS J00230515-7204280 RG* 00 23 05.1727415516 -72 04 27.976636939 15.0 13.8 12.6   11.24 ~ 10 0
5 2MASS J00231284-7210190 RG* 00 23 12.8729002094 -72 10 19.010823162 15.2 13.7 12.421   10.9 ~ 6 0
6 2MASS J00232278-7201038 RG* 00 23 22.7985486646 -72 01 03.800502061 15.3 13.4 11.9   10.3 ~ 8 0
7 2MASS J00240449-7157112 RG* 00 24 04.5019157450 -71 57 11.123340411 15.4 13.5 12.0   10.4 ~ 4 0
8 2MASS J00240507-7200035 RG* 00 24 05.1011870531 -72 00 03.303896696 15.3 13.5 12.0   10.3 ~ 5 0
9 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3462 0
10 2MASS J00241580-7200415 RG* 00 24 15.8136774247 -72 00 41.450435289 15.3 13.8 12.5   11.1 ~ 5 0
11 2MASS J00244581-7209106 RG* 00 24 45.8174565898 -72 09 10.457503729 14.9 13.7 12.5   11.2 ~ 6 0
12 [TSA2014] 5968 RG* 00 26 27.2101784729 -71 47 44.066383358 15.2 13.584 12.191   10.6 ~ 11 0
13 2MASS J00262847-7150127 RG* 00 26 28.4777692076 -71 50 12.803925706 15.3 13.808 12.4   11.0 ~ 10 0
14 [TSA2014] 5265 s?r 00 26 57.4520553905 -71 49 13.916021905 15.4 13.6 12.1   10.6 ~ 11 0
15 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1405 1
16 NGC 1851 GlC 05 14 06.76 -40 02 47.6   8.80 7.23     ~ 1206 0
17 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 784 0
18 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2223 0
19 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2090 0
20 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1722 0
21 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1631 0
22 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 1966 0
23 M 12 GlC 16 47 14.18 -01 56 54.7   8.52 6.07     ~ 555 0
24 M 8 HII 18 03 37 -24 23.2           ~ 545 1
25 M 22 GlC 18 36 23.94 -23 54 17.1   7.16 6.17     ~ 1174 0
26 NGC 6705 OpC 18 51 05 -06 16.2   6.32 5.8     ~ 349 0
27 M 71 GlC 19 53 46.49 +18 46 45.1   7.91 6.1     ~ 996 0
28 M 75 GlC 20 06 04.841 -21 55 20.14     8.26     ~ 296 0

    Equat.    Gal    SGal    Ecl

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2019.10.17-03:34:52

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