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| Paper: |
Bright Stars and Metallicity Spread in the Globular Cluster omega Centauri |
| Volume: |
165, The Third Stromlo Symposium: The Galactic Halo |
| Page: |
316 |
| Authors: |
Ortolani, Sergio; Covino, Stefano; Carraro, Giovanni |
| Abstract: |
The globular cluster omega Centauri (NGC~5139) is the most massive and brightest cluster in our Galaxy. It has also a moderately high mass to light ratio (3.6) and an anomalous flattening (0.83) for a globular cluster. This cluster is also very interesting because it is one of a few examples of globular clusters with a measurable spread in the metal abundance (see Da Costa & Willumsen 1981, Norris et al. 1996, and Suntzeff and Kraft 1996 and references therein) and then it offers a unique, big sample of nearby stars having all the same distance and reddening but showing different metallicity (and age ?) effects. A recent paper by Norris et al. (1997) shows also an interesting correlation between kinematics and metal abundance. |
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