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1 results

  • Chemical abundances in tidally disrupted globular clusters

  • D. Yong, J. Meléndez, K. Cunha, A. I. Karakas, J. E. Norris, V. V. Smith
  • Journal:
    Proceedings of the International Astronomical Union / Volume 5 / Issue S266 / August 2009
    Published online by Cambridge University Press:
    18 January 2010, pp. 157-160
    Print publication:
    August 2009
    • Article
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  • We present abundance measurements in the tidally disrupted globular cluster NGC 6712. In this cluster, there are large star-to-star variations of the light elements C, N, O, F and Na. While such abundance variations are seen in every well-studied globular cluster, they are not found in field stars and indicate that clusters like NGC 6712 cannot provide many field stars and/or field stars do not form in environments with chemical-enrichment histories like those of NGC 6712. Preliminary analysis of NGC 5466, another tidally disrupted cluster, suggests little (if any) abundance variation for O and Na and the abundance ratios [X/Fe] are comparable to field stars at the same metallicity. Therefore, globular clusters like NGC 5466 may have been Galactic building blocks.