NOAO >   Observing Info >   Approved Programs >   2017A-0336

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Program Information for 2017A-0336


PI: Bo Ma, U. of Florida, boma@ufl.edu
Address: Astronomy Department, 211 Bryant Space Science Center, Gainesville, FL 32611 USA

CoI: Ji Wang, California Institute of Technology
CoI: Nolan Grieves, U. of Florida
CoI: Mark Everett, NOAO
CoI: Jian Ge, U. of Florida
CoI: Jiwei Xie, Nanjing University

Title: A Multiplicity Survey of Solar-type Stars with Brown Dwarf Companions

Abstract: Brown dwarfs (BD) are objects that are in the mass range between planets and stars. Studying their formation mechanisms is vital towards our understanding of the origins of stars and planets since they could either form like giant planets or low-mass stars. To investigate whether they form more like giant planets or more like low-mass stars, we propose to continue our previous work on measuring the multiplicity rate of brown dwarf host stars using high-spatial resolution speckle imaging with NESSI at WIYN. This study will detect more unique BD systems to investigate BD formation mechanisms in binaries and improve the multiplicity rate measurement accuracy by $sim30%$ for BD host stars. We will compare the measured multiplicity rate to that of field stars and giant planet host stars to study the impact of stellar companions on brown dwarf formation. It is the first systematic study of multiplicity rate for the largest close-in BD host star sample using speckle imaging. Results from this study will put serious constraints on brown dwarf formation theories and address missing links between planet formation and star formation.

Program Type: Standard/NASA WIYN

Scheduled Nights:
Run 1 (2017A):  WIYNQ/NESSI -- 5.5hrs
Run 2 (2017A):  WIYNQ/NESSI -- 5.5hrs


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-0336

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