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New Light On The Formation And Evolution Of M 31 And Its Globular Cluster System

ASTRONOMY & ASTROPHYSICS, no. 3 (2005): 909-934

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We present spectroscopic ages, metallicities, and [alpha/Fe] ratios for 70 globular clusters in M 31 that were derived from Lick line-index measurements. A new interpolation technique of age-metallicity and alpha/Fe-diagnostic grids is used to account for changes in index strength as a response to abundance-ratio variations, in particular...更多

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