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| Paper: |
RR Lyrae Variables in Globular Clusters and Nearby Galaxies |
| Volume: |
310, Variable Stars in the Local Group (IAU Colloquium 193) |
| Page: |
113 |
| Authors: |
Catelan, M. |
| Abstract: |
I point out that the Oosterhoff dichotomy for globular cluster and field RR Lyrae stars may place the strongest constraints so far on the number of dwarf spheroidal-like protogalactic fragments that may have contributed to the formation of the Galactic halo. The first calibration of the RR Lyrae period-luminosity relation in I, J, H, K taking evolutionary effects into account is provided. Problems in the interpretation of RR Lyrae light curves and evolutionary properties are briefly reviewed. |
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