High-resolution abundance analysis of red giants in the globular cluster NGC 6522

  title={High-resolution abundance analysis of red giants in the globular cluster NGC 6522},
  author={Beatriz Barbuy and Cristina Chiappini and Erika Cantelli and {\'E}ric Depagne and Marco Pignatari and Raphael Hirschi and Gabriele Cescutti and Sergio Ortolani and Vanessa Hill and Manuela Zoccali and Dante Minniti and Marina Trevisan and E. Bica and A. Crespo G'omez},
  journal={Astronomy and Astrophysics},
Context. The [Sr/Ba] and [Y/Ba] scatter observed in some galactic halo stars that are very metal-poor and in a few individual stars of the oldest known Milky Way globular cluster NGC 6522 have been interpreted as evidence of early enrichment by massive fastrotating stars (spinstars). Because NGC 6522 is a bulge globular cluster, the suggestion was that not only the very-metal poor halo stars, but also bulge stars at [Fe/H] ∼−1 could be used as probes of the stellar nucleosynthesis signatures… 

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