Ca II Triplet Spectroscopy of Large Magellanic Cloud Red Giants. I. Abundances and Velocities for a Sample of Populous Clusters

@article{Grocholski2006CaIT,
  title={Ca II Triplet Spectroscopy of Large Magellanic Cloud Red Giants. I. Abundances and Velocities for a Sample of Populous Clusters},
  author={Aaron J. Grocholski and Andrew A. Cole and Ata Sarajedini and Douglas Geisler and Verne V. Smith},
  journal={The Astronomical Journal},
  year={2006},
  volume={132},
  pages={1630 - 1644}
}
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 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 Ca II triplet are used to derive cluster radial velocities and abundances. We determine mean cluster velocities to typically 1.6 km s-1 and mean metallicities to 0.04 dex… 
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