NOAO >   Observing Info >   Approved Programs >   2012B-0077

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Proposal Information for 2012B-0077


PI: Catherine A Pilachowski, Indiana University, catyp@astro.indiana.edu
Address: Astronomy Department, 727 E 3rd Street, Bloomington, IN 47405-7105, USA

Title: Fluorine in Metal-Poor Stars with Phoenix

Abstract: \vspace0.2in Observations of the 2.3358 micron feature of the molecule HF with the Phoenix IR spectrograph on the 2.1-m telescope will be used to characterize the evolution of the abundance of fluorine in the context of the chemical evolution of the halo and thick disk of the Milky Way. The relative contributions of fluorine produced in AGB stars, in W-R stars, and in SN IIa varies with metallicity and with star formation history. Since fluorine is produced in different sites at different metallicities, and is sensitive to physical conditions at the sites of nucleosynthesis, it is potentially useful for chemically tagging stellar populations, but only if its abundance as a function of metallicity is understood in the disk and halo.


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NOAO >   Observing Info >   Approved Programs >   2012B-0077

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