NOAO >   Observing Info >   Approved Programs >   2011A-0197

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Proposal Information for 2011A-0197


PI: Jae-Woo Lee, Sejong University, jaewoolee@sejong.ac.kr
Address: Astronomy Department, 98 Gunja, Gwangjin, Seoul 143-747, Korea

CoI: Alistair Walker, CTIO

Title: Ca by Photometry of Northern Globular Clusters

Abstract: Our recent study of Galactic globular clusters using Ca by photometry has shown that many globular clusters have multiple red giant branch populations with distinct calcium abundances. This suggests that these globular clusters, like \omega Cen, are most likely the relics of more massive primeval dwarf galaxies that merged and disrupted to form the proto-Galaxy. We seek to obtain high precision Ca by photometry for 12 northern globular clusters, which have never been studied using Ca by photometry, using the KP-4m/Mosaic and our own Ca by filters. Some of our target clusters have signatures of multiple stellar populations and our proposed program will complement our extensive Ca by southern globular cluster survey. Therefore, our proposed observations will provide unique opportunity to explore fundamental aspects of stellar evolution, the star formation and chemical enrichment histories of globular clusters, and furthermore, the formation of the Milky Way Galaxy in the (Lambda)CDM hierarchical merging paradigm.


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NOAO >   Observing Info >   Approved Programs >   2011A-0197

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