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Age and Metallicity Effects in ω Centauri: StrÖmgren Photometry at the Main-Sequence Turnoff
We have observed (with vby filters) a field north of the core of the most massive globular cluster in our galaxy, ω Centauri. We have found a correlation of age and metallicity in a region that avoids the dense core and the inhomogeneous foreground dust emission shown by IRAS. Our …