NOAO >   Observing Info >   Approved Programs >   2017A-0324

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Program Information for 2017A-0324


PI: Stephen Kane, San Francisco State U., skane@sfsu.edu
Address: USA

CoI: Robert Wittenmyer, University of Southern Queensland
CoI: Steve B Howell, NASA Ames Research Center
CoI: David Ciardi, California Institute of Technology
CoI: Justin Wittrock, San Francisco State U.
CoI: Elliott Horch, SCSU
CoI: Mark Everett, NOAO

Title: Searching for Wide-Binary Companions to Exoplanet Host Stars

Abstract: Though there are over 3,300 confirmed exoplanets known, the binarity of exoplanet host stars is not well understood. The host stars of planets detected using the radial velocity technique provide an excellent target sample from which to investigate the apparent discrepancy between stellar multiplicity of the exoplanet host stars and that of the general stellar population. Here we proposal to utilize the excellent resolving power of the Differential Speckle Survey Instrument on Gemini South to continue our survey of southern exoplanet host stars to search for stellar companions. The target list includes 20 known exoplanet host stars and 25 with RV linear trends from the AAPS survey. The resolution will allow us to detect companions 8 magnitudes fainter with typical separations between 1 AU and 30-60 AU. This separation range encompasses the peak of the binary period distribution observed for G dwarfs in the solar neighborhood. The results from these observations will confirm a previously detected potential companion, determine the source of RV trends, and inform the planet formation scenarios and exoplanet property correlations for known exoplanetary systems.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2017A):  GEM-S-SVC/DSSI -- 9hrs band 3 (GS-2017A-Q-76)


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-0324

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