NOAO >   Observing Info >   Approved Programs >   2012B-0493

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Proposal Information for 2012B-0493


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

CoI: Bo Ma, University of Florida
CoI: Eric Petersen, University of Florida
CoI: Rui Li, University of Florida
CoI: Ji Wang, University of Florida
CoI: Brian Lee, University of Washington
CoI: Nathan De Lee, Vanderbuilt University
CoI: Scott Fleming, Penn State

Title: Follow-up of MARVELS Brown Dwarf and Planet Candidates

Abstract: The SDSS-III MARVELS planet search is the the largest homogeneous single radial velocity (RV) survey with moderate-high Doppler precision (10-30 m/s for V=7.6-12 FGK stars). To date, over 3000 stars have been observed at the SDSS 2.5m telescope with more than 20 times over about two year time windows. All of the survey data for 2580 FGK stars from the first two and half years have been processed with the latest data pipeline. A total of 24 new brown dwarfs (BD) and 28 new planet candidates have been identified in the processed RV data. This proposal requests KPNO 2.1m telescope time with the EXPERT instrument, to follow up all of these BD and planet candidates to confirm the detections and characterize the orbits. The results will be used to (1). reveal the overall distribution of the new BDs and giant planets in the parameter space; (2). measure occurrence rates of BDs and giants planets around stars with different mass and metallicity, especially at the low metallicity end; (3). measure dryness of the brown dwarf desert; (4). constrain theoretical models regarding the formation of substellar companions (BDs and giant planets); (5). identify additional companions associated with the detected systems.


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NOAO >   Observing Info >   Approved Programs >   2012B-0493

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