Poster Title: Tracking the Metallicity Gradient of the Large Magellanic Cloud
Abstract: Andrew Cole, Tammy Smecker-Hane, Eline Tolstoy, & John S. Gallagher
We have measured stellar abundances for more than 600 red giants in four fields of the Large Magellanic Cloud, using the near-infrared calcium II triplet. Corrected for inclination, the fields lie at projected distances of 0.3, 2.1, 2.3, and 4.7 kiloparsecs from the LMC center of light. These data, combined with existing deep photometry, allows us to measure the evolution of the mean metallicity and age-metallicity relation with radius in the LMC. The zero-metallicity-gradient case is ruled out at the 2 sigma level. The most likely explanation for the radial metallicity variation is a strong excess of stars younger than 3 Gyr in the bar with respect to the disk.
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