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HST-NICMOS Observations of M31's Metal Rich Globular Clusters and Their Surrounding Fields: II. Results

Abstract:

We have obtained HST-NICMOS observations of five of M31's most metal rich globular clusters: G1, G170, G174, G177 and G280. For the two clusters farthest from the nucleus we statistically subtract the field population and estimate metallicities using K-(J-K) color-magnitude diagrams (CMDs). Based on the slopes of their infrared giant branches we estimate [Fe/H]=-1.22+/-0.43 for G1 and -0.15+/-0.37 for G280. We combine our infrared observations of G1 with two epochs of optical HST-WFPC2 V-band...

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Publisher copy:
10.1086/320388

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Publication date:
2000-11-02
DOI:
URN:
uuid:15fe3456-92e1-427b-bda8-a4038eefe3de
Source identifiers:
499772
Local pid:
pubs:499772
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