NOAO >   Observing Info >   Approved Programs >   2006B-0532

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Proposal Information for 2006B-0532


PI: Jian Ge, The University of Florida, jge@astro.ufl.edu
Address: Department of Astronomy, 211 Bryant Space Science Center, Gainesville, USA

CoI: Julian van Eyken, The University of Florida
CoI: Curtis DeWitt, The University of Florida
CoI: Roger Cohen, The University of Florida
CoI: Scott Fleming, The University of Florida
CoI: Pencheng Guo, The University of Florida
CoI: Justin Crepp, The University of Florida

Title: Confirm and Search for Planet Candidates with the KPNO ET Instrument

Abstract: We propose to follow up 20 planet candidates around F, G and K stars and search 100 more high metallicity ([Fe/H]>0.2) F, G and K stars with V=8-9 using the new generation high throughput Doppler instrument called Exoplanet Tracker (ET) at the KPNO 2.1m telescope. The planet candidates were identified during our planet survey of a total of 150 F, G and K dwarfs and subdwarfs using the Coude Feed 0.9 m/2.1m telescopes and ET in Dec. 04 to Feb. 06. So far, we have detected one new planet, ET-1 (HD 102195b), around a V=8.0 G8V star (Ge et al. 2006). At typical 10 min exposure with the 2.1m, we reached ~10 m/s Doppler precision with this star. Measurements of a RV stable star, Tau Ceti, show that the instrument Doppler precision follows the photon noise limited errors down to ~3 m/s. Monitoring of a planet bearing star, 51 Peg, shows that the instrument is at least stable to ~13 m/s over two months, indicating that ET can be used for monitoring planets with intermediate periods (1 month - 1 yr). Our goal is to detect 5-10 short period planets and 1 transit planet over the next observation year. Our data will also be used for identifying planet candidates with intermediate periods.


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