NOAO >   Observing Info >   Approved Programs >   2010A-0439

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Proposal Information for 2010A-0439


PI: Jian Ge, University of Florida, jge@astro.ufl.edu
Address: Astronomy Department, 211 Bryant Space Science Center, Gainesville, FL 32611, USA

CoI: Brian Lee, University of Florida
CoI: Scott Fleming, University of Florida
CoI: Peng Jiang, University of Florida
CoI: Nathan De Lee, University of Florida
CoI: Ji Wang, University of Florida
CoI: Jiwei Xie, University of Florida

Title: Follow-up studies of SDSS-III MARVELS survey planet candidates

Abstract: We propose to observe ~30 extrasolar planet and brown dwarf candidates using the EXtremely high Precision ExtrasolaR planet Tracker (EXPERT) at the KPNO 2.1m. EXPERT was commissioned at the 2.1m in September 2009, replacing the Exoplanet Tracker (ET) instrument to provide high precision Doppler measurement and high resolution spectroscopy capability. Compared to ET, EXPERT has a large simultaneous wavelength coverage (0.39-0.7 (micron) vs. 0.5-0.56 (mu)m) and high dispersion (R=18,000 vs. R=6,000). Our commissioning measurements show that the instrument produces a Doppler precision of about 1-2 m/s for a solar type star with S/N~ 100 per pixel using iodine absorption calibration. The measured average instrument throughput from the telescope fiber tip to the detector is 18.8% at 0.55 (mu)m. This Doppler sensitivity will not only allow us to follow up MARVELS planet candidates to confirm the detection and characterize the new planet orbital parameters, but also find additional low mass and/or long term planet companions. Our results will be used for statistical study of planet properties and also investigation of planet formation, migration and evolution. We will also monitor EXPERT long term performance and prepare the instrument for public access in 2010B.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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