CaII Triplet Spectroscopy of Small Magellanic Cloud Red Giants. II. Abundances for a Sample of Field Stars

  title={CaII Triplet Spectroscopy of Small Magellanic Cloud Red Giants. II. Abundances for a Sample of Field Stars},
  author={Maria Celeste Parisi and Douglas Geisler and Aaron J. Grocholski and Juan J. Clari{\'a} and Ata Sarajedini},
  journal={arXiv: Solar and Stellar Astrophysics},
We have obtained metallicities of ~ 360 red giant stars distributed in 15 Small Magellanic Cloud (SMC) fields from near-infrared spectra covering the CaII triplet lines using the VLT + FORS2. The errors of the derived [Fe/H] values range from 0.09 to 0.35 dex per star, with a mean of 0.17 dex. The metallicity distribution of the whole sample shows a mean value of [Fe/H] = -1.00 +- 0.02, with a dispersion of 0.32 +- 0.01, in agreement with global mean [Fe/H] values found in previous studies. We… Expand
Red giants in the Small Magellanic Cloud - II. Metallicity gradient and age-metallicity relation
We present results from the largest Ca II triplet line metallicity study of Small Magellanic Cloud (SMC) field red giant stars to date, involving 3037 objects spread across approximately 37.5 deg 2 ,Expand
We have obtained near-infrared spectra covering the Ca II triplet lines for a large number of stars associated with 16 Small Magellanic Cloud (SMC) clusters using the VLT + FORS2. These data composeExpand
Photometric metallicity map of the Large Magellanic Cloud
We have estimated a metallicity map of the Large Magellanic Cloud (LMC) using the Magellanic Cloud Photometric Survey (MCPS) and Optical Gravitational Lensing Experiment (OGLE III) photometric data.Expand
The near-infrared Ca ii triplet as a metallicity indicator – II. Extension to extremely metal-poor metallicity regimes
We extend our previous calibration of the infrared Caii triplet as metallicity indicator to the metal-poor regime by including observations of 55 field stars with [Fe/H] down to -4.0 dex. While weExpand
The age-metallicity relationship of the Large Magellanic Cloud field star population from wide-field Washington photometry
We analyze age and metallicity estimates for an unprecedented database of some 5.5 million stars distributed throughout the Large Magellanic Cloud (LMC) main body, obtained from CCD Washington CT 1Expand
The Comparative Chemical Evolution of an Isolated Dwarf Galaxy : A VLT and Keck Spectroscopic Survey of WLM
Building on our previous spectroscopic and photometric analysis of the isolated Local Group dwarf irregular (dIrr) galaxy WLM, we present a comparison of the metallicities of its red giant branchExpand
The Ca ii triplet in red giant spectra: [Fe/H] determinations and the role of [Ca/Fe]
Measurements are presented and analyzed of the strength of the Ca II triplet lines in red giants in Galactic globular and open clusters, and in a sample of red giants in the LMC disk that haveExpand
A Radial Velocity and Calcium Triplet Abundance Survey of Field Small Magellanic Cloud Giants
We present the results of a pilot wide-field radial velocity and metal abundance survey of red giants in 10 fields in the Small Magellanic Cloud (SMC). The targets lie at projected distances of 0.9Expand
Deriving metallicities from calcium triplet spectroscopy in combination with near-infrared photometry
Context. When established with sufficient precision the ages, metallicities and kinematics of the Galactic globular clusters (GGCs) can shed much light on the dynamical and chemical evolution of theExpand
Self-consistent physical parameters for five intermediate-age SMC stellar clusters from CMD modelling
Context. Stellar clusters in the Small Magellanic Cloud (SMC) are useful probes for studying the chemical and dynamical evolution of this neighbouring dwarf galaxy, enabling inspection of a largeExpand


Analysis and calibration of CaII triplet spectroscopy of red giant branch stars from VLT/FLAMES observations
We demonstrate that low-resolution Ca ii triplet (CaT) spectroscopic estimates of the overall metallicity ([Fe/H]) of individual red giant branch (RGB) stars in two nearby dwarf spheroidal galaxiesExpand
Ca II Triplet Spectroscopy of Large Magellanic Cloud Red Giants. I. Abundances and Velocities for a Sample of Populous Clusters
Using the FORS2 instrument on the Very Large Telescope, we have obtained near-infrared spectra for more than 200 stars in 28 populous LMC clusters. This cluster sample spans a large range of agesExpand
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
Old Stellar Populations of the Small Magellanic Cloud
We present WFPC2 and ground-based VI photometry of NGC 121 and a nearby field in the outer SMC. For NGC 121, we measure a true distance modulus of μ0 = 18.96 ± 0.04 (distance of 61.9 ± 1.1 kpc), ageExpand
The Infrared Ca II Triplet as Metallicity Indicator
From observations of almost 500 red giant branch stars in 29 Galactic open and globular clusters, we have investigated the behavior of the infrared Ca II triplet (8498, 8542, and 8662 A) in the ageExpand
Elemental Abundances in Evolved Supergiants. I. NGC 330, a Young SMC Cluster
We report on the results of our analyses of high-quality spectroscopic observations of seven giants in NGC 330. The mean value of [Fe/H] for the cluster is -0.94 ± 0.02 (σ = 0.04). This is consistentExpand
The effects of age on red giant metallicities derived from the near-infrared Ca II triplet
We have obtained spectra with a resolution of 2.5 in the region of ≈7500–9500 for 116 red giants in five galactic globular clusters and six old open clusters (five with published metallicities andExpand
Tracing the formation history of intermediate-age star clusters in the Small Magellanic Cloud
Colour-magnitude diagrams (CMDs) are presented for the first time for 10 star clusters projected on to the Small Magellanic Cloud (SMC). The photometry was carried out in the Washington system C andExpand
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
Young star clusters immersed in intermediate-age fields in the Small Magellanic Cloud
We present CCD photometry in the Washington C and T 1 filters for six star clusters (B 34, NGC 256, NGC 265, NGC 294, ΙC 1611 and NGC 376) in the Small Magellanic Cloud (SMC) and their surroundingExpand