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