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| Paper: |
The horizontal-branch stars in globular clusters as tracers of galactic evolution |
| Volume: |
13, The Formation and Evolution of Star Clusters |
| Page: |
205 |
| Authors: |
Lee, Young-Wook |
| Abstract: |
Recent advances in our understanding of the horizontal-branch stars in globular clusters are discussed, with special emphasis on the Sandage period-shift effect among RR Lyrae stars, and the second parameter problem of horizontal-branch morphology. They provide important implications for the age-metallicity and the age-galactocentric distance relations among globular clusters, which have direct impacts on the chronology of the Galaxy formation. The emerging picture of Galactic evolution suggests that the formation of the halo was a prolonged and chaotic affair. |
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