Calcium II Triplet Spectroscopy of LMC Red Giants. I. Abundances and Velocities for a Sample of Populous Clusters

Abstract

Abridged Abstract - Utilizing the FORS2 instrument on the VLT, we have obtained near infrared spectra for more than 200 stars in 28 populous LMC clusters. This cluster sample spans a large range of ages (~ 1-13 Gyr) and metallicities (-0.3 > [Fe/H] > -2.0) and has good areal coverage of the LMC disk. The strong absorption lines of the Calcium II triplet are used to derive cluster radial velocities and abundances. We determine mean cluster velocities to typically 1.6 km/s and mean metallicities to 0.04 dex (random error). For eight of these clusters, we report the first spectroscopically determined metallicities based on individual cluster stars, and six of these eight have no published radial velocity measurements. (continued in paper)

26 pages of text plus 14 figures and 6 tables. Accepted for publication in AJ. Scheduled for Vol. 132, No. 4 (October 2006)

References in corpus (34)

• Evolutionary tracks and isochrones for low- and intermediate-mass stars: from 0.15 to 7 M_sun, and from Z=0.0004 to 0.03
• Evolutionary population synthesis: models, analysis of the ingredients and application to high-z galaxies
• Theoretical isochrones in several photometric systems I. Johnson-Cousins-Glass, HST/WFPC2, HST/NICMOS, Washington, and ESO Imaging Survey filter sets
• Abundances for Globular Cluster Giants: I. Homogeneous Metallicities for 24 Clusters
• New Understanding of Large Magellanic Cloud Structure, Dynamics and Orbit from Carbon Star Kinematics
• Halo Substructure And The Power Spectrum
• Magellanic Cloud Structure from Near-IR Surveys I: The Viewing Angles of the LMC
• Empirical calibration of the near-IR Ca II triplet - I. The stellar library and index definition
• A Globular Cluster Metallicity Scale Based on the Abundance of Fe II
• Galactic Globular Cluster Metallicity Scale from the Calcium Triplet. II. Rankings, Comparisons and Puzzles
• Population effects on the Red Giant Clump absolute magnitude, and distance determinations to nearby galaxies
• A New Look at the Large-Scale HI Structure of the LMC
• Complexity on Small Scales: The Metallicity Distribution of the Carina Dwarf Spheroidal Galaxy
• Ca II Triplet Spectroscopy of Giants in SMC Star Clusters: Abundances, Velocities and the Age-Metallicity Relation
• Observations and Implications of the Star Formation History of the LMC
• Magellanic Cloud Structure from Near-IR Surveys II: Star Count Maps and the Intrinsic Elongation of the LMC
• Galactic Globular Cluster Metallicity Scale from the Ca II Triplet. I. Catalog
• Spectroscopy of Red Giants in the LMC Bar: Abundances, Kinematics, and the Age-Metallicity Relation
• A Search for Old Star Clusters in the Large Magellanic Cloud
• A revised and extended catalog of Magellanic System clusters, associations and emission nebulae. II. the LMC
• The Effects of Age on Red Giant Metallicities Derived from the Near-Infrared Ca II Triplet
• WIYN Open Cluster Study. X. The K-Band Magnitude of the Red Clump as a Distance Indicator
• Chemical Compositions of Red Giant Stars in Old Large Magellanic Cloud Globular Clusters
• Using the Ca II Triplet to Trace Abundance Variations in Individual Red Giant Branch stars in Three Nearby Galaxies
• The Star Formation History of the Large Magellanic Cloud
• Chemical Abundances in Twelve Red Giants of the Large Magellanic Cloud from High-Resolution Infrared Spectroscopy
• Empirical calibration of the near-IR Ca II triplet - III. Fitting functions
• Explaining the mysterious age gap of globular clusters in the Large Magellanic Cloud
• Testing intermediate-age stellar evolution models with VLT photometry of LMC clusters. III. Padova results
• Testing Stellar Population Models with Star Clusters in the Large Magellanic Cloud
• Hubble Space Telescope Observations of the Oldest Star Clusters in the LMC
• Globular Clusters in the Magellanic Clouds.II: IR-Array Photometry for 12 Globulars and Contributions to the Integrated Cluster Light
• The Stellar Populations in the Outer Regions of M33. I. Metallicity Distribution Function
• HST Colour-Magnitude Diagrams of Six Old Globular Clusters in the LMC

Cited by in corpus (101)

• The Star Formation History of the Large Magellanic Cloud
• Third-Epoch Magellanic Cloud Proper Motions II: The Large Magellanic Cloud Rotation Field in Three Dimensions
• The influence of chemical composition on the properties of Cepheid stars. II-The iron content
• A double main sequence turn-off in the rich star cluster NGC 1846 in the Large Magellanic Cloud
• Looking outside the Galaxy: the discovery of chemical anomalies in 3 old Large Magellanic Cloud clusters
• The chemical composition of red giant stars in four intermediate-age clusters of the Large Magellanic Cloud
• OGLE-ing the Magellanic System: Optical Reddening Maps of the Large and Small Magellanic Cloud from Red Clump Stars
• The Chemical Enrichment History of the Large Magellanic Cloud
• Chemical abundances in LMC stellar populations. II. The bar sample
• The metallicity gradient as a tracer of history and structure: the Magellanic Clouds and M33 galaxies
• The Carnegie-Chicago Hubble Program. I. An Independent Approach to the Extragalactic Distance Scale Using only Population II Distance Indicators
• The VMC Survey IV. The LMC star formation history and disk geometry from four VMC tiles
• Heavy Element Nucleosynthesis in the Brightest Galactic Asymptotic Giant Branch stars
• The age-metallicity relationship of the Large Magellanic Cloud field star population from wide-field Washington photometry
• Old-Aged Stellar Population Distance Indicators
• Is Extra Mixing Really Needed in Asymptotic Giant Branch Stars?
• Ca II Triplet Spectroscopy of Small Magellanic Cloud Red Giants. I. Abundances and Velocities for a Sample of Clusters
• Photometric metallicity map of the Large Magellanic Cloud
• Physical parameters of 15 intermediate-age LMC clusters from modelling of HST colour-magnitude diagrams
• Starbursts in the Local Universe: new HST/ACS observations of the irregular galaxy NGC 4449
• An estimate of the structural parameters of the Large Magellanic Cloud using red clump stars
• How stellar rotation shapes the colour magnitude diagram of the massive intermediate-age star cluster NGC 1846
• The search for multiple populations in Magellanic Clouds clusters - V. Correlation between cluster age and abundance spreads
• Chemical composition of the old globular clusters NGC 1786, NGC 2210 and NGC 2257 in the Large Magellanic Cloud
• The TP-AGB phase. Lifetimes from C and M star counts in Magellanic Cloud clusters
• The Close Binary Properties of Massive Stars in the Milky Way and Low-Metallicity Magellanic Clouds
• Photometric metallicity map of the Small Magellanic Cloud
• Old, Metal-Poor Extreme Velocity Stars in the Solar Neighborhood
• Ca II Triplet Spectroscopy of Small Magellanic Cloud Red Giants. III. Abundances and Velocities for a Sample of 14 Clusters
• A VLT/FLAMES study of the peculiar intermediate-age Large Magellanic Cloud star cluster NGC 1846 - I. Kinematics
• AGB stars of the intermediate-age LMC cluster NGC 1846 II. Dredge up along the AGB
• The Magellanic Squall: Gas Replenishment from the Small to Large Magellanic Cloud
• A Comparison of Optical and Near-Infrared Colours of Magellanic Cloud Star Clusters with Predictions of Simple Stellar Population Models
• Metallicities, Age--Metallicity relationships, and Kinematics of Red Giant Branch Stars in the Outer Disk of the Large Magellanic Cloud
• The VISCACHA survey - I. Overview and First Results
• Joint Analysis of near-infrared properties and surface brightness fluctuations of LMC star clusters
• Structure of the Large Magellanic Cloud from the Near Infrared magnitudes of Red Clump stars
• Very metal-poor stars observed by the RAVE survey
• Stellar Metallicities and Kinematics in a Gas-Rich Dwarf Galaxy: First Calcium Triplet Spectroscopy of RGB Stars in WLM
• The WAGGS project - I. The WiFeS Atlas of Galactic Globular cluster Spectra
• Metallicities and Radial Velocities of Five Open Clusters Including a New Candidate Member of the Monoceros Stream
• METAL: The Metal Evolution, Transport, and Abundance in the Large Magellanic Cloud Hubble program. II. Variations of interstellar depletions and dust-to-gas ratio within the LMC
• The star formation history of the Large Magellanic Cloud star cluster NGC1751
• Distances to Populous Clusters in the LMC via the K-Band Luminosity of the Red Clump
• The VMC survey -- XLIV: Mapping metallicity trends in the Large Magellanic Cloud using near-infrared passbands
• Globular Cluster Abundances from High-Resolution, Integrated-Light Spectroscopy. III. The Large Magellanic Cloud: Fe and Ages
• Abundance ratios and IMF slope in the dwarf elliptical galaxy NGC~1396 with MUSE
• Age Determination of Fifteen Old to Intermediate-Age Small Magellanic Cloud Star Clusters
• Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud: II. Relative ages and distances for six ancient globular clusters
• Metallicity distribution functions of the old populations of the Magellanic Clouds from RR Lyrae stars
• Dynamical masses and mass-to-light ratios of resolved massive star clusters -- II. Results for 26 star clusters in the Magellanic Clouds
• The Quest for the Missing Dust: II -- Two Orders of Magnitude of Evolution in the Dust-to-Gas Ratio Resolved Within Local Group Galaxies
• On the Recovery of the Star Formation History of the LMC from the VISTA Survey of the Magellanic System
• Recovering star formation histories: Integrated-light analyses vs stellar colour-magnitude diagrams
• On the Age and Metallicity Estimation of Spiral Galaxies Using Optical and Near-Infrared Photometry
• Reddening map and recent star formation in the Magellanic Clouds based on OGLE IV Cepheids
• The star formation history of the Large Magellanic Cloud star clusters NGC1846 and NGC1783
• Tagging the Chemical Evolution History of the Large Magellanic Cloud Disk
• Evidence of differential tidal effects in the old globular cluster population of the Large Magellanic Cloud
• Evolution of dust and molecular hydrogen in the Magellanic System
• The AGB stars of the intermediate-age LMC cluster NGC 1846 Variability and age determination
• CaII Triplet Spectroscopy of Small Magellanic Cloud Red Giants. II. Abundances for a Sample of Field Stars
• The Magellanic Edges Survey I. Description and First Results
• Toward the general RGB slope-metallicity-age calibration: I Metallicities, Ages and Kinematics for Eight LMC Clusters
• The WAGGS project - II. The reliability of the calcium triplet as a metallicity indicator in integrated stellar light
• Integrated J- and H-band spectra of globular clusters in the LMC: implications for stellar population models and galaxy age dating
• Formation of the off-center bar in the Large Magellanic Cloud: A collision with a dark satellite ?
• Kinematical Structure of the Magellanic System
• Hierarchical structures in the Large and Small Magellanic Clouds
• The dynamical origin of multiple populations in intermediate-age clusters in the Magellanic Clouds
• The VMC survey -- XXXIX: Mapping metallicity trends in the Small Magellanic Cloud using near-infrared passbands
• Integrated K-band spectra of old and intermediate-age globular clusters in the Large Magellanic Cloud
• Ca II Triplet Spectroscopy of Small Magellanic Cloud Red Giants. V. Abundances and Velocities for 12 Massive Clusters
• Two kinematically distinct old globular cluster populations in the Large Magellanic Cloud
• Blue straggler evolution caught in the act in the Large Magellanic Cloud globular cluster Hodge 11
• Chemical and structural analysis of the Large Magellanic Cloud using the fundamental mode RR Lyrae stars
• Kinematic Structure of the Large Magellanic Cloud Globular Cluster System from Gaia eDR3 and Hubble Space Telescope Proper Motions
• Metallicity estimates of young clusters in the Magellanic Clouds from Stromgren photometry of supergiant stars
• Radial Velocity and Metallicity of the Globular Cluster IC4499 Obtained with AAOmega
• Revisiting the evolved hypergiants in the Magellanic Clouds
• Stellar variability at the main-sequence turnoff of the intermediate-age LMC cluster NGC 1846
• Accurate radial velocity and metallicity of the Large Magellanic Cloud old globular clusters NGC 1928 and NGC 1939
• A sample of relatively unstudied star clusters in the Large Magellanic Cloud: fundamental parameters determined from Washington photometry
• The overlooked role of stellar variability in the extended main sequence of LMC intermediate-age clusters
• The RR Lyrae Delay-Time Distribution: A Novel Perspective on Models of Old Stellar Populations
• Short period variability in the globular cluster NGC 419 and the SMC field
• Deep Washington photometry of inconspicuous star cluster candidates in the Large Magellanic Cloud
• Probing the LMC age gap at intermediate cluster masses
• A segmented period-luminosity relation for nearby extragalactic $\delta$ Scuti stars
• Population I Cepheids and star formation history of the Large Magellanic Cloud
• A likely runaway star cluster in the outer disc of the Large Magellanic Cloud
• On the Origin of the Kinematical Differences Between the Stellar Halo and the Old Globular Cluster System in the Large Magellanic Cloud
• First Evidence of Globular Cluster Formation from the Ejecta of Prompt Type Ia Supernovae
• Strömgren metallicities for intermediate-age and old star clusters
• Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud V: Multiple Populations in ancient Globular Clusters
• A high-resolution spectroscopic search for multiple populations in the 2 Gyr old cluster NGC 1846
• Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud: III. Horizontal Branch Morphology
• Evolution of the Small Magellanic Cloud
• On the self-consistent physical parameters of LMC intermediate-age clusters
• Hubble Space Telescope proper motions of Large Magellanic Cloud star clusters -- II. Kinematic structure of young and intermediate-age clusters
• The star clusters of the Magellanic System