Calcium and Light-elements Abundance Variations from High-resolution Spectroscopy in Globular Clusters

  title={Calcium and Light-elements Abundance Variations from High-resolution Spectroscopy in Globular Clusters},
  author={Eugenio Carretta and Angela Bragaglia and Raffaele Gratton and Sara Lucatello and Michele Bellazzini and Valentina Bologna and INAF-Osservatorio astronomico di Padova and Excellence Cluster Universe and Garching},
  journal={The Astrophysical Journal},
We use abundances of Ca, O, Na, and Al from high-resolution UVES spectra of 200 red giants in 17 globular clusters (GCs) to investigate the correlation found by Lee et al. between chemical enrichment from SN II and star-to-star variations in light elements in GC stars. We find that (1) the [Ca/H] variations between first and second generation stars are tiny in most GCs ({approx}0.02-0.03 dex, comparable with typical observational errors). In addition, (2) using a large sample of red giants in M… Expand

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