Following up Kepler Objects of Interest Using Adaptive Optics Images

Details Following up Kepler Objects of Interest Using Adaptive Optics Images Following up Kepler Objects of Interest Using Adaptive Optics Images

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21822703a&link_type=abstract

American Astronomical Society, AAS Meeting #218, #227.03; Bulletin of the American Astronomical Society, Vol. 43, 2011

Physics

Optics

Scientific paper

With the recent announcement of over 1200 candidate transiting planets, the Kepler space mission has an enormous need for high-quality follow-up observations, both to confirm the planetary nature of its candidates and to accurately measure their characteristics. The pixel size for Kepler images is just under 4", which means that close companion stars could dilute the signal from the target star, leading to an underestimate of the planetary parameters, or even a false positive detection. High-resolution images are thus vital to either detect potential contaminants or to rule out their presence with high confidence.
Here we present images taken by ARIES, a near-infrared PI instrument using adaptive optics on the MMT. When operated in the f/30 mode, images are 20" x 20" and have a resolution of 0.02" per pixel. During the 2009-2010 seasons of Kepler follow-up, 37 Kepler Objects of Interest, or KOIs, were imaged with ARIES; 11 of them had at least one companion within 2" of the target star, the closest having a separation of only 0.15". We show images of various companion stars and describe the limits placed on objects by magnitude difference and separation. We will also discuss how these companion stars affect the parameters as determined by Kepler

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