NOAO >   Observing Info >   Approved Programs >   2011A-0510

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Proposal Information for 2011A-0510


PI: Courtney Epstein, The Ohio State University, epstein@astronomy.ohio-state.edu
Address: Astronomy Department, McPherson Laboratory, 140 W 18th Avenue, Columbus, Ohio 43210-1173, USA

CoI: Jennifer Johnson, The Ohio State University
CoI: Marc H. Pinsonneault, The Ohio State University
CoI: David Lai, UCO/Lick Observatory

Title: Testing the Age-Metallicity Relation for the Galactic Disk with CoRoT Red Giants

Abstract: We propose to use a combination of astroseismic data and high- resolution spectroscopic abundances to determine the age-metallicity relation for the Galactic disk. CoRoT and Kepler astereseismology can provide mass, radius, and age information independent of traditional isochrone age measurements. This new technique produces ages accurate to ~15% if it is complemented with abundance information. We are therefore asking for two nights of Keck HIRES time to observe 26 red giants 2-4 kpc away from the Sun that have asteroseismic data from the CoRoT satellite to gain the necessary metallicity and abundance ratio measurements. With these data we will gain a new look at the age- metallicity relation and investigate the Galactic chemical enrichment history - not just of iron, but also (alpha) and heavier elements- with much finer age resolution.


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NOAO >   Observing Info >   Approved Programs >   2011A-0510

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