NOAO >   Observing Info >   Approved Programs >   2014B-0035

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Proposal Information for 2014B-0035


PI: Steve Howell, NASA ARC, Steve.b.howell@nasa.gov
Address: Astronomy Department, M/S 244-30, Moffett Field, CA 94035, USA

CoI: Elliott Horch, Southern Connecticut State University
CoI: Mark Everett, NOAO
CoI: David Ciardi, Caltech
CoI: Johanna Teske, Carnegie Inst. / DTM

Title: Characterization of the Properties of Binary Exoplanet Host Stars

Abstract: Using high resolution speckle imaging of Kepler exoplanet host stars, we have compared the rate of detected companions to Monte Carlo predictions. We find that the rate of companion detections are, within uncertainties, consistent with our predictions if the binary fraction of exoplanet host stars is near 50%. These preliminary findings are based on a small sample of superior resolution and very high contrast imaging obtained last year at Gemini-N telescope. We wish to observe a larger sample of stars in order to raise our statistical significance of this result. Our sample proposed herein ranges over spectral type, stellar distance, and exoplanet properties (period, radius) to fully assess the binary fraction as a function of primary host star. Additionally, we want to determine the orbital period distribution of the exoplanet host star binaries and their stellar content. Only Gemini+DSSI observations can progress our initial findings, increase their significance, and provide detailed information about binary stars hosting exoplanets.


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 >   2014B-0035

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