NOAO >   Observing Info >   Approved Programs >   2003A-0183

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Proposal Information for 2003A-0183


PI: Timothy Beers, Dept. of Physics & Astronomy, beers@pa.msu.edu
Address: Michigan State University, BPS 3268, E. Lansing, MI 48824, USA

CoI: Norbert Christlieb, Hamburger Sternwarte, Hamburg, Germany
CoI: Silvia Rossi, IAG, University of Sao Paulo, Brazil
CoI: Jaehyon Rhee, Astronomy Dept., University of Virginia
CoI: Sean Ryan, Physics & Astronomy, Open University
CoI: Brian Marsteller, Physics & Astronomy, Michigan State University

Title: Indentification and Analysis of Metal-Poor Carbon-Enhanced Stars in the Halo of the Galaxy

Abstract: We propose to \bf complete a medium-resolution spectroscopic survey of some 400 carbon-enhanced stars in the halo of the Galaxy selected from the Hamburg/ESO survey. The targets are a mix of canonical ``carbon stars,'' some of which are likely to be intermediate- mass AGB stars useful as tracers of disrupted dwarf galaxies, and the so- called ``metal-poor carbon-enhanced'' (MPCE) stars with [Fe/H] < -1.5, which provide insight on the nature of stellar carbon production in the early Galaxy. The spectra we seek will be used, along with 2MASS JHK photometry, for first-pass classification of the targets, so that the most interesting stars can be identified for subsequent high-resolution spectroscopy. We will measure radial velocities for the entire sample, and estimates of [Fe/H] and [C/Fe] will be obtained for the MPCE stars.


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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