NOAO >   Observing Info >   Approved Programs >   2010A-0202

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Proposal Information for 2010A-0202


PI: Stephen J. Williams, Georgia State University, swilliams@chara.gsu.edu
Address: Physics Department, P.O. Box 4106, Atlanta, GA 30302-4106, USA

CoI: Douglas R. Gies, Georgia State University
CoI: Rachel A. Matson, Georgia State University

Title: Spectroscopic Orbits for Eclipsing Binaries Among the NASA Kepler Observatory Targets

Abstract: We are starting a program of precise photometry with the NASA Kepler Observatory to search for variations in minimum light timing for intermediate mass eclipsing binaries. Such periodic variations will reveal the reflex motion caused by any distant, low mass object that orbits the close binary. Kepler's unprecedented accuracy and continuous observations provide a unique opportunity to detect low mass companions to these targets, down to a few Jupiter masses. To further constrain the properties of the unseen third companion, we need to determine the properties of the central binary as well. The goal of this proposal is to obtain spectra of these targets in order to derive radial velocities and produce a double-lined spectroscopic orbit. This orbit, when combined with the eclipsing light curve from Kepler data, will give highly accurate masses and radii for the components of the central binary, and will constrain the mass ratio for the unseen companion, allowing a rough classification of the object.


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NOAO >   Observing Info >   Approved Programs >   2010A-0202

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