The five planets in the Kepler-296 binary system all orbit the primary: a statistical and analytical analysis
Article
Article Title | The five planets in the Kepler-296 binary system all orbit the primary: a statistical and analytical analysis |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Barclay, Thomas (Author), Quintana, Elisa V. (Author), Adams, Fred C. (Author), Ciardi, David R. (Author), Huber, Daniel (Author), Foreman-Mackey, Daniel (Author), Montet, Benjamin T. (Author) and Caldwell, Douglas (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 809 (1), pp. 7-16 |
Article Number | 7 |
Number of Pages | 10 |
Year | 2015 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/809/1/7 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-637X/809/1/7 |
Abstract | Kepler-296 is a binary star system with two M-dwarf components separated by 0 2. Five transiting planets have been confirmed to be associated with the Kepler-296 system; given the evidence to date, however, the planets could in principle orbit either star. This ambiguity has made it difficult to constrain both the orbital and physical properties of the planets. Using both statistical and analytical arguments, this paper shows that all five planets are highly likely to orbit the primary star in this system. We performed a Markov-Chain Monte Carlo simulation using a five transiting planet model, leaving the stellar density and dilution with uniform priors. Using importance sampling, we compared the model probabilities under the priors of the planets orbiting either the brighter or the fainter component of the binary. A model where the planets orbit the brighter component, Kepler-296A, is strongly preferred by the data. Combined with our assertion that all five planets orbit the same star, the two outer planets in the system, Kepler-296 Ae and Kepler-296 Af, have radii of 1.53 ± 0.26 and 1.80 ± 0.31 RA, respectively, and receive incident stellar fluxes of 1.40 ± 0.23 and 0.62 ± 0.10 times the incident flux the Earth receives from the Sun. This level of irradiation places both planets within or close to the circumstellar habitable zone of their parent star. |
Keywords | binaries: general; methods: data analysis; methods: statistical; planetary systems; stars: individual (Kepler-296, KIC 11497958, KOI-1422); techniques: photometric; |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | National Aeronautics and Space Administration (NASA), United States |
University of Michigan, United States | |
University of Sydney | |
New York University, United States | |
California Institute of Technology (Caltech), United States | |
NASA Ames Research Center, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4300/the-five-planets-in-the-kepler-296-binary-system-all-orbit-the-primary-a-statistical-and-analytical-analysis
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