NOAO > Observing Info > Approved Programs > 2010B-0477
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NOAO > Observing Info > Approved Programs > 2010B-0477 |
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PI: Jennifer Johnson, Ohio State University, jaj@astronomy.ohio-state.edu
Address: Department of Astronomy, 140 W. 18th Ave, Columbus, OH 43210, USA
CoI: Katharine Schlesinger, Ohio State University
CoI: Jessica Orwig, Ohio State University
Title: The Metallicity of the Halo: Calibration of M giants
Abstract: The metal-rich end of the halo metallicity distribution function is poorly known, but of great interest, because it is related to the metallicities of the satellite galaxies that merged to become part of the Milky Way halo. While halo M giants have been identified for decades, their metallicities are essentially unknown because of the difficulty of modeling their spectra, although to be M giants they should have [Fe/H] \gtrsim -1. We propose to use M giants in globular clusters with known metallicities, distances, and reddenings to calibrate spectral indices based on molecular features. These indices can then be used to determine the properties of M giants in the halo.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2010B-0477 |
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