Chemical abundances in tidally disrupted globular clusters

David Yong, J. Meléndez, K Cunha, A. I. Karakas, John Edward Norris, V. V. Smith

Research output: Chapter in Book/Report/Conference proceedingChapter (Book)Research

Abstract

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.

Original languageEnglish
Title of host publicationStar clusters: basic galactic building blocks throughout time and space
Pages157-160
Number of pages4
Volume5
EditionS266
DOIs
Publication statusPublished - 2009
Externally publishedYes

Publication series

NameProceedings of the International Astronomical Union
NumberS266
Volume5
ISSN (Print)17439213
ISSN (Electronic)17439221

Keywords

  • Galaxy: abundances
  • Globular clusters: individual (NGC 5466
  • NGC 6712)
  • Stars: abundances

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