AAS 205th Meeting, 9-13 January 2005
Session 21 Stars Throughout the Milky Way
Poster, Monday, January 10, 2005, 9:20am-6:30pm, Exhibit Hall

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[21.09] A New Analysis of the Bidelman & MacConnell Low-Metallicity Candidates

J.A. Krugler, D. Frank, T.C. Beers (Michigan State), J.E. Norris (MSSSO/ANU), M. Chiba (U. Tohoku, Japan)

A new set of very high signal-to-noise ( > 100/1), medium-resolution (1 Å) spectra have been obtained at Siding Springs Observatory for the sample of candidate low-metallicity stars originally selected by Bidelman & MacConnell, and reported on two decades ago by Norris, Bessell, & Pickles (1985). The sample has been supplemented with newly available proper motions from a variety of sources, as well as with JHK photometry from the 2MASS Point Source Catalog. Based on these data, we measure improved radial velocities, re-determine estimates of [Fe/H], provide new estimates of [C/Fe], and obtain full space motions for the majority of the stars in this catalog. Associations of these stars with various recognized stellar populations (the thin disk, thick disk, metal-weak thick disk, and halo) are discussed.

This work received partial funding support from grant PHY 02-16783, Physics Frontier Centers/JINA: Joint Institute for Nuclear Astrophysics, awarded by the US National Science Foundation.

The author(s) of this abstract have provided an email address for comments about the abstract: kruglerj@msu.edu

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© 2004. The American Astronomical Society.