AAS 207th Meeting, 8-12 January 2006
Session 124 Cool Stars
Poster, Wednesday, 9:20am-6:30pm, January 11, 2006, Exhibit Hall

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[124.07] Exploring the Ca II Triplet as a Metallicity Indicator in M Supergiants

A.M. Brooks, G. Wallerstein (U Washington)

We present results to calibrate the Ca II triplet lines as a metallicity indicator in M supergiants. Stars in the open clusters h and chi Per, the Large Magellanic Cloud, and the Small Magellanic Cloud were observed in the 8400-8700Å region to derive equivalent widths of the Ca II triplet lines. The data have been analysed to derive correlations of equivalent widths with effective temperature, surface gravity, and metallicity.

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