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Exclusion of Stellar Companions to Exoplanet Host Stars

Wittrock, Justin M. and Kane, Stephen R. and Horch, Elliott P. and Howell, Steve B. and Ciardi, David R. and Everett, Mark E. (2017) Exclusion of Stellar Companions to Exoplanet Host Stars. Astronomical Journal, 154 (5). Art. No. 184. ISSN 1538-3881. doi:10.3847/1538-3881/aa8d69.

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Given the frequency of stellar multiplicity in the solar neighborhood, it is important to study the impacts this can have on exoplanet properties and orbital dynamics. There have been numerous imaging survey projects established to detect possible low-mass stellar companions to exoplanet host stars. Here, we provide the results from a systematic speckle imaging survey of known exoplanet host stars. In total, 71 stars were observed at 692 and 880 nm bands using the Differential Speckle Survey Instrument at the Gemini-north Observatory. Our results show that all but two of the stars included in this sample have no evidence of stellar companions with luminosities down to the detection and projected separation limits of our instrumentation. The mass–luminosity relationship is used to estimate the maximum mass a stellar companion can have without being detected. These results are used to discuss the potential for further radial velocity follow-up and interpretation of companion signals.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Kane, Stephen R.0000-0002-7084-0529
Horch, Elliott P.0000-0003-2159-1463
Howell, Steve B.0000-0002-2532-2853
Ciardi, David R.0000-0002-5741-3047
Everett, Mark E.0000-0002-0885-7215
Additional Information:© 2017 American Astronomical Society. Received 2017 July 31 Accepted 2017 September 15 Published 2017 October 12 The authors would like to thank the referee for providing feedback that improved the quality of the paper. This work is based on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), Ministério da Ciência, Tecnologia e Inovação (Brazil) and Ministerio de Ciencia, Tecnología e Innovación Productiva (Argentina). This research has made use of 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. The results reported herein benefited from collaborations and/or information exchange within NASA's Nexus for Exoplanet System Science (NExSS) research coordination network sponsored by NASA's Science Mission Directorate.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Subject Keywords:planetary systems; techniques: high angular resolution
Issue or Number:5
Record Number:CaltechAUTHORS:20171013-091029917
Persistent URL:
Official Citation:Justin M. Wittrock et al 2017 AJ 154 184
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:82339
Deposited By: Ruth Sustaita
Deposited On:16 Oct 2017 20:43
Last Modified:15 Nov 2021 19:49

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