NOAO >   Observing Info >   Approved Programs >   2017A-0293

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Program Information for 2017A-0293


PI: Nolan Grieves, U. of Florida, ngrieves@ufl.edu
Address: Astronomy Department, 211 Bryant Space Science Center, Gainesville, FL 32611 USA

CoI: Bo Ma, U. of Florida
CoI: Jian Ge, U. of Florida
CoI: Neil Thomas, USAFA

Title: Investigating Binary Trends of Solar-type Stars Hosting Brown Dwarfs and Giant Planets

Abstract: Brown dwarfs are objects within the mass range between giant planets and low-mass stars. Observations show a lack of these objects orbiting solar-type stars compared to planets and stellar companions, known as the brown dwarf desert. Currently there are no conclusive explanations of this desert, and whether these objects form more like giant planets or low-mass stars is still undetermined. Constraining formation mechanisms of specific brown dwarf systems is crucial in understanding the creation of both planets and stars. Using the speckle imaging of NESSI at WIYN, we will constrain the multiplicity of several brown dwarf and giant planet host stars that show long-term linear trends in their radial velocity data, suggesting the presence of a stellar companion. With the high-spatial resolution of NESSI, we will be able to characterize the orbital dynamics of these systems and determine their impact on present formation theories. Results from this study will create a unique sample with high-resolution radial velocity and imaging data to address current uncertainties in the formation of giant planets and brown dwarfs.

Program Type: Standard/NASA WIYN

Scheduled Nights:
Run 1 (2017A):  WIYNQ/NESSI -- 1hrs
Run 2 (2017A):  WIYNQ/NESSI -- 2hrs


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



NOAO >   Observing Info >   Approved Programs >   2017A-0293

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