PI: Suchitra Balachandran, University of Maryland, email@example.com
Address: College Park, MD 20742, USA
CoI: John Carr, Naval Research Laboratory
CoI: Bruce Carney, University of North Carolina
Title: Oxygen abundances in metal-poor stars from IR-OH lines
Abstract: The goal of this project is to examine the evolution of oxygen in the early Galaxy by measuring IR-OH lines in metal-poor stars. Oxygen is critical to numerous astrophysical contexts including the derivation of globular cluster ages and the early history of the Galaxy's chemistry. However, its abundance, particularly in metal-poor stars, has been controversial, with different abundance indicators suggesting either a flat [O/Fe] ratio or one that increases as metallicity decreases. The IR vibrational-rotational OH lines provide a robust alternative to previous indicators and is the only diagnositc that can be applied to both dwarfs and giants. The end result of our observations will be a good characterization of the evolution of this important element.
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