| Metallicity Gradients at Large Galactocentric Radii Using the Near-infrared Calcium Triplet (2009) | |||||||||
Abstract | |||||||||
| We describe a new spectroscopic technique for measuring radial metallicity gradients out to large galactocentric radii. We use the DEIMOS multi-object spectrograph on the Keck telescope and the galaxy spectrum extraction technique of Proctor et al. (2009). We also make use of the metallicity sensitive near-infrared (NIR) Calcium triplet (CaT) features together with single stellar population models to obtain metallicities. Our technique is applied as a pilot study to a sample of three relatively nearby (. Comment: 13 Pages, 9 Figures, 7 Tables, Accepted for publication in MNRAS | |||||||||
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