NOAO >   Observing Info >   Approved Programs >   2013A-0246

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Proposal Information for 2013A-0246


PI: Steve B. Howell, NASA ARC, steve.b.howell@nasa.gov
Address: Astrophysics, P.O. Box 1 M/S 244-30, Moffett Field, CA 94035, US

CoI: Mark Everett, NOAO
CoI: David Silva, NOAO
CoI: Paula Szkody, University of Washington
CoI: David Ciardi, NexSci/Caltech

Title: Spectroscopy of Kepler Exo-planet Transit Candidate Stars

Abstract: We propose to continue our spectroscopic follow-up program in support of the NASA Kepler Mission. The Kepler extended Mission is now focusing on exoplanet candidates which are small, less than 2.5 R_earth, and those in long-period, near habitable zone orbits. Kepler currently has over 2000 planet candidates, the majority of which are initially listed as smaller than 4 R_earth and orbit stars with R>14. For three years now, we have spectroscopically observed Kepler stars fainter than 14th and have developed techniques and pipeline software to provide T_\rm eff to +/-75 K and log g(cgs) to +/-0.15 dex, values as good as the follow-up on the bright stars from 1 to 2-m class high resolution spectroscopic coverage of the brighter stars. Our primary goal is to obtain reconnaissance spectra of currently known and newly discovered exoplanet host stars to provide robust values for T_\rm eff and log g. We have already shown that many of the host stars are larger than assumed, thus their planets are larger than initially assumed. Other results include [m/H] evaluation, velocity information for the stars in EBs which show a third small component, and help toward discovery & validation of circumbinary planets (via RVs of the component stars).


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NOAO >   Observing Info >   Approved Programs >   2013A-0246

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