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The Composition of the Bulge Globular Cluster NGC 6273

  • C. A. Pilachowski (a1), C. I. Johnson (a2), R. M. Rich (a3), N. Caldwell (a2), M. Mateo (a4), J. I. Bailey (a4) and J. D. Crane (a5)...

Abstract

Observations of red giants in the Bulge globular cluster NGC 6273 with the Michigan/Magellan Fiber System (M2FS) mounted on the Nasmuth-East port of the Magellan-Clay 6.5-m telescope at the Las Campanas Observatory reveal a spread in metallicity. Members have been confirmed with radial velocity. NGC 6273 has at least two populations separated by 0.2-0.3 dex in [Fe/H]. The sodium and aluminum abundances are correlated while the magnesium and aluminum abundances are anti-correlated. The cluster also shows a rise in the abundance of the s-process element lanthanum with [Fe/H] similar to other massive clusters. The cluster contains a possible third population depleted in most elements by 0.3 dex.

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References

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Keywords

The Composition of the Bulge Globular Cluster NGC 6273

  • C. A. Pilachowski (a1), C. I. Johnson (a2), R. M. Rich (a3), N. Caldwell (a2), M. Mateo (a4), J. I. Bailey (a4) and J. D. Crane (a5)...

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