Lithium and proton-capture elements in globular cluster dwarfs: The case of 47 TUC

  title={Lithium and proton-capture elements in globular cluster dwarfs: The case of 47 TUC},
  author={Valentina D’Orazi and Sara Lucatello and Raffaele Gratton and Angela Bragaglia and Eugenio Carretta and Zhixia Shen and Simone Zaggia . INAF-Osservatorio Astronomico di Padova and Excellence Cluster Universe and Technische Universitat Munchen and INAF-Osservatorio astronomico di Bologna and National Astronomical Observatories and Chinese Academy of Science.},
  journal={The Astrophysical Journal},
Previous surveys in a few metal-poor globular clusters (GCs) showed that the determination of abundances for Li and proton-capture elements offers a key tool to address the intracluster pollution scenario. In this Letter, we present Na, O, and Li abundances in a large sample of dwarf stars in the metal-rich GC 47 Tucanae. We found a clear Na-O anticorrelation, in good agreement with what obtained for giant members by Carretta et al. While lithium and oxygen abundances appear to be positively… Expand

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