Globular Cluster Contributions to the Halo Field

Details Globular Cluster Contributions to the Halo Field Globular Cluster Contributions to the Halo Field

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21534008m&link_type=abstract

American Astronomical Society, AAS Meeting #215, #340.08; Bulletin of the American Astronomical Society, Vol. 42, p.446

Astronomy and Astrophysics

Astronomy

Scientific paper

We report the spectroscopic identification of halo field stars that appear to have originated in globular clusters. Using spectra from the Sloan Extension for Galactic Understanding and Evolution (SEGUE) survey, we identify a subset of halo giants with distinctly strong CN absorption and weak CH absorption, relative to field giants with similar metallicity and temperature. Since C-N anticorrelations like these have previously only been observed within globular clusters, we propose that these stars formed in globular clusters and were subsequently lost to the halo through tidal interactions or internal cluster evolution.

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