SIMBAD references

2015A&A...583A..69B - Astronomy and Astrophysics, volume 583A, 69-69 (2015/11-1)

NGC 6139: a normal massive globular cluster, or a first-generation dominated cluster? Clues from the light elements.

BRAGAGLIA A., CARRETTA E., SOLLIMA A., DONATI P., D'ORAZI V., GRATTON R.G., LUCATELLO S. and SNEDEN C.

Abstract (from CDS):

Information on globular clusters (GC) formation mechanisms can be gathered by studying the chemical signature of the multiple populations that compose these stellar systems. In particular, we investigate the anti-correlations among O, Na, Al, and Mg to explore the influence of cluster mass and environment on GCs in the Milky Way and in extragalactic systems. We present here the results obtained on NGC 6139, which, on the basis of its horizontal branch morphology, has been proposed to be dominated by first-generation stars. In our extensive study based on high-resolution spectroscopy, the first for this cluster, we found a metallicity of [Fe/H]=-1.579±0.015±0.058 (rms=0.040dex, 45 bona fide member stars) on the UVES scale defined by our group. The stars in NGC 6139 show a chemical pattern normal for GCs, with a rather extended Na-O (and Mg-Al) anti correlation. NGC 6139 behaves as expected from its mass and contains a large portion (about two thirds) of second-generation stars.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: atmospheres - stars: Population II - Galaxy: general - globular clusters: general - clusters: individual: NGC 6139 globular

VizieR on-line data: <Available at CDS (J/A+A/583/A69): phottab.dat tablea1.dat tablea2.dat tablea3.dat tablea4.dat>

Nomenclature: Table A.1: [BCS2015] tNNNNN N=48 among (Nos t00261-t06169). Table A.2: [BCS2015] tNNNNN N=64 among (Nos t00187-t04132).

Simbad objects: 131

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2021.06.22-22:27:09

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