NOAO >   Observing Info >   Approved Programs >   2017A-0301

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Program Information for 2017A-0301


PI: James W Davidson, Jr, U. of Virginia, james.w.davidson.jr@gmail.com
Address: Astronomy Department, PO Box 400325, Charlottesville, VA 22904 US

CoI: Elliott Horch, SCSU
CoI: Brian J Baptista, Aerospace Corporation
CoI: Steve B Howell, NASA Ames Research Center
CoI: Mark Everett, NOAO

Title: Which KOI Binaries are Gravitationally Bound?

Abstract: Binary star systems that host exoplanets appear to be more common than originally expected. The {it Kepler} mission, along with ground- based follow-up work, has discovered a number of Kepler Objects of Interest (KOIs) with nearby companions (within $sim$ 1 arcsec). However, observations to date do not conclusively demonstrate whether these nearby companions are gravitationally bound to the KOIs, or simply line of sight companions. We propose to continue our successful 2016B program to carry out speckle imaging observations of KOIs that have stellar companions using the NASA Exoplanet Star and Speckle Imager (NESSI), to answer the fundamental question of whether these systems are truly gravitationally bound. We will take a two method approach: 1) Determining if system components have common proper motion, and 2) placing system components on an H-R diagram to determine photometrically if they are consistent with being a binary pair. Isochrone fitting to system component will also provide constraints on system parameters, most importantly, for transit curve fitting, stellar radii.

Program Type: Standard/NASA WIYN

Scheduled Nights:
Run 1 (2017A):  WIYNQ/NESSI -- 5hrs


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NOAO >   Observing Info >   Approved Programs >   2017A-0301

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