Homogeneous metallicities and radial velocities for Galactic globular clusters: First CaT metallicities for twenty clusters

  title={Homogeneous metallicities and radial velocities for Galactic globular clusters: First CaT metallicities for twenty clusters},
  author={Ivo Saviane and Gary S. Da Costa and Enrico V. Held and Veronica Sommariva and Marco Gullieuszik and Beatriz Barbuy and S. Ortolani and Eső and Mt. Stromlo Observatory and Australia. and -INAF and Osservatorio Astronomico di Padova and Italy. and Royal Observatory and Belgium and Univ. of Sao Paulo and Brazil. and University of Padova and Osservatorio Astrofisico di Arcetri},
  journal={Astronomy and Astrophysics},
Well determined radial velocities and abundances are essential for analyzing the properties of the globular cluster system of the Milky Way. However more than 50% of these clusters have no spectroscopic measure of their metallicity. In this context, this work provides new radial velocities and abundances for twenty Milky Way globular clusters which lack or have poorly known values for these quantities. The radial velocities and abundances are derived from spectra obtained at the Ca ii triplet… Expand
Homogeneous metallicities and radial velocities for Galactic globular clusters
Although the globular clusters in the Milky Way have been studied for a long time, a significant fraction of them lack homogeneous metallicity and radial velocity measurements. In an earlier paper weExpand
Chemical abundances in bright giants of the globular cluster M62 (NGC 6266)
With the exception of Terzan 5, all the Galactic globular clusters that possess significant metallicity spreads, such as ω Cen and M22, are preferentially the more luminous clusters with extendedExpand
Detailed chemical abundances in NGC 5824: another metal-poor globular cluster with internal heavy element abundance variations
We present radial velocities, stellar parameters, and detailed abundances of 39 elements derived from high-resolution spectroscopic observations of red giant stars in the luminous, metal-poorExpand
FORS2/VLT survey of Milky Way globular clusters II. Fe and Mg abundances of 51 Milky Way globular clusters on a homogeneous scale
(ABRIDGED) Globular clusters trace the formation and evolution of the Milky Way and surrounding galaxies, and outline their chemical enrichment history. To accomplish these tasks it is important toExpand
A Spectroscopic Analysis of the Galactic Globular Cluster NGC 6273 (M19)
A combined effort utilizing spectroscopy and photometry has revealed the existence of a new globular cluster class. These "anomalous" clusters, which we refer to as "iron-complex" clusters, areExpand
Calcium triplet metallicity calibration for stars in the Galactic bulge
Aims. We present a new calibration of the calcium II triplet equivalent widths versus [Fe/H], constructed upon K giant stars in the Galactic bulge. This calibration will be used to derive ironExpand
A catalogue of masses, structural parameters, and velocity dispersion profiles of 112 Milky Way globular clusters
We have determined masses, stellar mass functions, and structural parameters of 112 Milky Way globular clusters by fitting a large set of N-body simulations to their velocity dispersion and surfaceExpand
The Chemical Composition of Red Giant Branch Stars in the Galactic Globular Clusters NGC 6342 and NGC 6366
We present radial velocities and chemical abundances for red giant branch stars in the Galactic bulge globular clusters NGC 6342 and NGC 6366. The velocities and abundances are based on measurementsExpand
A stellar census in globular clusters with MUSE
Aims. We use the spectra of more than 30 000 red giant branch (RGB) stars in 25 globular clusters (GC), obtained within the MUSE survey of Galactic globular clusters, to calibrate the Ca II tripletExpand
NGC 5824: a luminous outer halo globular cluster with an intrinsic abundance spread
ABSTRACT We present a detailed study of the strengths of the calcium triplet absorptionlines in the spectra of a large sample of red giant members of the luminous outerGalactic halo globular clusterExpand


Metallicities and radial velocities of five open clusters including a new candidate member of the Monoceros stream
Near-infrared spectra of 133 red giant stars from 10 Galactic open clusters and two Galactic globular clusters spanning 2.2dex in metallicity and 11Gyr in age are presented. We combine this sampleExpand
Abundances for globular cluster giants: I. homogeneous metallicities for 24 clusters
We have obtained high resolution, high signal-to-noise ratio CCD echelle spectra of 10 bright red giants in 3 globular clusters (47 Tuc, NGC 6752 and NGC 6397) roughly spanning the whole range ofExpand
Ca II Triplet Spectroscopy of Giants in Small Magellanic Cloud Star Clusters: Abundances, Velocities, and the Age-Metallicity Relation
We have obtained spectra at the Ca II triplet of individual red giants in seven Small Magellanic Cloud (SMC) star clusters whose ages range from ~4 to 12 Gyr. The spectra have been used to determineExpand
Integrated-Light Spectroscopy of Globular Clusters at the Infrared CA II Lines
Integrated-light spectroscopy has been obtained for 27 globular clusters at the Ca II IR triplet. Line strengths and radial velocities have been measured from the spectra. For the well-studiedExpand
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
Comparing the properties of local globular cluster systems: implications for the formation of the Galactic halo
We investigate the hypothesis that some fraction of the globular clusters presently observed in the Galactic halo formed in external dwarf galaxies. This is done by means of a detailed comparisonExpand
A Comparison of Elemental Abundance Ratios in Globular Clusters, Field Stars, and Dwarf Spheroidal Galaxies
We have compiled a sample of globular clusters with high-quality stellar abundances from the literature to compare to the chemistries of stars in the Galaxy and in dwarf spheroidal galaxies. Of theExpand
NGC 6558 : a blue horizontal branch moderately metal-poor globular cluster in the bulge
We present, for the first time, a detailed abundance analysis of five giant stars in the moderately metal-poor bulge globular cluster NGC 6558. Spectra have been obtained at the VLT with theExpand
We present elemental abundances for 855 red giant branch (RGB) stars in the globular cluster Omega Centauri (ω Cen) from spectra obtained with the Blanco 4 m telescope and Hydra multifiberExpand
Metallicities for old stellar systems from Ca II triplet strengths in member giants
Spectra of a large sample of giants in six well-studied Galactic globular clusters are used to investigate the utility of Ca II triplet line strengths as an abundance indicator. It is found that theExpand