PI: Bruce W. Carney, University of North Carolina, email@example.com
Address: Dept. of Physics & Astronomy, CB \#3255, Chapel Hill, NC 27599-3255, USA
CoI: David W. Latham, Center for Astrophysics
CoI: John B. Laird, Bowling Green State University
CoI: David Yong, University of North Carolina
Title: The Chemical History of the Monoceros Ring
Abstract: We propose to use Hydra on the WIYN telescope to observe candidate red giant members of the Monoceros Ring, in order to explore the chemical history of that star stream compared to other outer disk stars and clusters. The system has a well-defined radial velocity (Yanny et al. 2003, 2004) which we may compare to those derived for our target stars. By comparing the observed spectra with a large grid of synthetic spectra, we will also derive good estimates for gravity and chemical composition, including both [Fe/H] and [(alpha)/Fe]. If the Monoceros Ring is a merger event, we expect to discern unusual [(alpha)/Fe] vs.\ [Fe/H] behavior at the velocity of the structure.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360