M54 + Sagittarius = ω Centauri

@article{Carretta2010M54S,
title={M54 + Sagittarius = $\omega$ Centauri},
author={Eugenio Carretta and A. Bragaglia and R. G. Gratton and Sara Lucatello and Michele Bellazzini and G. Catanzaro and F. Leone and Yazan Momany and Giampaolo Piotto and V. D'Orazi INAF-Oss.Astr.Bologna and INAF-Oss.Astr.Padova and Excellence Cluster Universe and Garching and INAF-Oss.Astr.Catania and Universita' di Catania and Eső and Chile. and Universit̀a di Padova},
journal={The Astrophysical Journal},
year={2010},
volume={714},
pages={7-11}
}
We derive homogeneous abundances of Fe, O, Na, and α-elements from high-resolution FLAMES spectra for 76 red giant stars in NGC 6715 (M54) and for 25 red giants in the surrounding nucleus of the Sagittarius (Sgr) dwarf galaxy. Our main findings are the following. (1) We confirm that M54 shows intrinsic metallicity dispersion, ~0.19 dex rms. (2) When the stars of the Sgr nucleus are included, the metallicity distribution strongly resembles that in ω Cen; the relative contribution of the most… Expand
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References

SHOWING 1-10 OF 43 REFERENCES
Elemental Abundances in Five Stars in M54, A Globular Cluster Associated with the Sagittarius Galaxy
• Physics
• 1999
Chemical abundances in five stars in M54, a globular cluster associated with the Sagittarius dwarf galaxy, have been determined using high-resolution echelle spectra. We find the cluster to haveExpand
The Nucleus of the Sagittarius dSph Galaxy and M54: A Window on the Process of Galaxy Nucleation
We present the results of a thorough study of the nucleus of the Sgr dwarf spheroidal galaxy (Sgr dSph) and of the bright globular cluster M54 (NGC 6715) that resides within the same nucleus (Sgr,N).Expand
Na-O anticorrelation and HB. VII. The chemical composition of first and second-generation stars in 1
We present abundances of Fe, Na, and O for 1409 red giant stars in 15 galactic globular clusters (GCs), derived from the homogeneous analysis of high-resolution FLAMES/GIRAFFE spectra. Combining theExpand
Na-O anticorrelation and HB. VIII. Proton-capture elements and metallicities in 17 globular clusters
We present homogeneous abundance determinations for iron and some of the elements involved in the proton-capture reactions (O, Na, Mg, Al, and Si) for 202 red giants in 17 Galactic globular clustersExpand
A LARGE SAMPLE STUDY OF RED GIANTS IN THE GLOBULAR CLUSTER OMEGA CENTAURI (NGC 5139)
• Physics
• 2009
We present abundances of several light, α, Fe-peak, and neutron-capture elements for 66 red giant branch (RGB) stars in the Galactic globular cluster Omega Centauri (ω Cen). Our observations lie inExpand
Intrinsic iron spread and a new metallicity scale for globular clusters
We have collected spectra of about 2000 red giant branch (RGB) stars in 19 Galactic globular clusters (GC) using FLAMES@VLT (about 100 stars with GIRAFFE and about 10 with UVES, respectively, in eachExpand
The O-Na and Mg-Al anticorrelations in turn-off and early subgiants in globular clusters
High dispersion spectra (R > 40 000) for a quite large number of stars at the main sequence turn-o and at the base of the giant branch in NGC 6397 and NGC 6752 were obtained with the UVES on KueyenExpand
Abundances in Red Giant Stars of NGC 2808 and Correlations between Chemical Anomalies and Global Parameters in Globular Clusters
We present the abundance analysis of stars from the tip of the red giant branch (RGB) to below the RGB bump in the globular cluster NGC 2808 based on high-resolution echelle spectra. We deriveExpand
A Near-Infrared Spectroscopic Screening of the Red Giant Populations in ω Centauri*
• Physics
• 2003
Near-infrared spectra of 21 giants in ω Cen spanning the whole range of metallicities observed in this cluster are presented. This work is part of a coordinated photometric and spectroscopic campaignExpand
Origin of abundance inhomogeneity in globular clusters
• Physics
• 2007
We numerically investigate abundance properties of the Galactic globular clusters (GCs) by adopting a new “external pollution” scenario. In this framework, GCs are assumed to originate in formingExpand