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Robo-AO Kepler Planetary Candidate Survey III. Adaptive Optics Imaging of 1629 Kepler Exoplanet Candidate Host Star

Ziegler, Carl and Law, Nicholas M. and Morton, Tim and Baranec, Christoph and Riddle, Reed and Atkinson, Dani and Baker, Anna and Roberts, Sarah and Ciardi, David R. (2017) Robo-AO Kepler Planetary Candidate Survey III. Adaptive Optics Imaging of 1629 Kepler Exoplanet Candidate Host Star. Astronomical Journal, 153 (2). Art. No. 66. ISSN 1538-3881.

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The Robo-AO Kepler Planetary Candidate Survey is observing every Kepler planet candidate host star with laser adaptive optics imaging to search for blended nearby stars, which may be physically associated companions and/or responsible for transit false positives. In this paper, we present the results of our search for stars nearby 1629 Kepler planet candidate hosts. With survey sensitivity to objects as close as ~0"15, and magnitude differences Δm ⩽6, we find 223 stars in the vicinity of 206 target KOIs; 209 of these nearby stars have not been previously imaged in high resolution. We measure an overall nearby-star probability for Kepler planet candidates of 12.6% ± 0.9% $ at separations between 0"15 and 4"0. Particularly interesting KOI systems are discussed, including 26 stars with detected companions that host rocky, habitable zone candidates and five new candidate planet-hosting quadruple star systems. We explore the broad correlations between planetary systems and stellar binarity, using the combined data set of Baranec et al. and this paper. Our previous 2σ result of a low detected nearby star fraction of KOIs hosting close-in giant planets is less apparent in this larger data set. We also find a significant correlation between detected nearby star fraction and KOI number, suggesting possible variation between early and late Kepler data releases.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Ziegler, Carl0000-0002-0619-7639
Law, Nicholas M.0000-0001-9380-6457
Morton, Tim0000-0002-8537-5711
Baranec, Christoph0000-0002-1917-9157
Riddle, Reed0000-0002-0387-370X
Atkinson, Dani0000-0001-8589-1938
Ciardi, David R.0000-0002-5741-3047
Additional Information:© 2017. The American Astronomical Society. Received 2016 May 11. Accepted 2016 September 21. Published 2017 January 13. We thank Adam Kraus et al. for sharing a preprint of their paper. This research has made use of the SIMBAD database, operated by Centre des Données Stellaires (Strasbourg, France), and bibliographic references from the Astrophysics Data System maintained by SAO/NASA. This research has made use of the Kepler Community FollowUp Observing Program Web site ( and the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. This work used the K2fov (Mullally & Barclay 2016) Python package. Facilities: PO:1.5m (Robo-AO), Keck:II (NIRC2-LGS), Gemini:Gillett (NIRI).
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Subject Keywords:binaries: close – instrumentation: adaptive optics – methods: data analysis – methods: observational – planets and satellites: detection – techniques: high angular resolution
Issue or Number:2
Record Number:CaltechAUTHORS:20170120-103732215
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Official Citation:Carl Ziegler et al 2017 AJ 153 66
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73573
Deposited By: Ruth Sustaita
Deposited On:22 Jan 2017 16:58
Last Modified:28 Aug 2020 23:52

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