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| Paper: |
Horizontal Branch Morphology and the 2nd Parameter Problem |
| Volume: |
92, Formation of the Galactic Halo. . . . Inside and Out |
| Page: |
221 |
| Authors: |
Fusi Pecci, F.; Bellazzini, M.; Ferraro, F. R.; Buonanno, R.; Corsi, C. E. |
| Abstract: |
We review the most outstanding issues related to the study of the morphology of the horizontal branch (HB) in the color--magnitude diagrams of Galactic globular clusters and its use as age indicator. It is definitely demonstrated that age cannot be the only \s driving the HB morphology. Other candidate ßare briefly examined, with special attention to the possible influence of cluster stellar density. A procedure is presented through which the measured HB morphology can be depurated from the effects of parameters other than age so that a rough determination of the age of globulars could still be obtained from their HBs. This method could be very useful for dating globular clusters in nearby galaxies. |
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