NOAO >   Observing Info >   Approved Programs >   2005A-0351

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Proposal Information for 2005A-0351


PI: Sarah Robinson, UCSC, ser@astro.ucsc.edu
Address: Astronomy Department, 1156 High St, Santa Cruz, CA 95060, USA

CoI: Debra Fischer, SFSU Physics Department
CoI: Mark Ammons, UCSC Astronomy Department
CoI: Gregory Laughlin, UCSC Astronomy Department
CoI: Jay Strader, UCSC Astronomy Department

Title: N2K: The Next Two Thousand Metal-Rich Stars

Abstract: The goal of the N2K collaboration is to identify the next 2000 closest, brightest metal-rich stars that are not on current target lists for radial velocity surveys aimed at detecting Hot Jupiters. Using the knowledge that stars with [Fe/H] >=0.2 have five times the probability of harboring a short-period planet as stars with Solar metallicity, we have developed a planet-search screening technique based on low-resolution spectra that measures stellar metallicity with a precision of +/- 0.08 dex. Our target stars will be pre-screened with a metallicity calibration based on broadband photometry that gives estimates good to +/- 0.2 dex for V=9 stars. Since planet occurrence is such a sensitive function of metallicity, we will observe 3000 stars with the KPNO 2.1m telescope, from which 1500-2000 super- metal-rich stars will be selected for the ongoing Keck Doppler velocity survey. From this dataset, we expect to identify at least ~60 new Hot Jupiters, which have a high probability of exhibiting transits and being members of multiple-planet systems. Identifying short-period planets will constrain the free parameters in orbital circularization theory and help reveal the internal structure of planets and the mechanisms for stopping orbital migration.


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NOAO >   Observing Info >   Approved Programs >   2005A-0351

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