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Published January 20, 2013 | Published + Submitted
Journal Article Open

On the Relative Sizes of Planets within Kepler Multiple-candidate Systems

Abstract

We present a study of the relative sizes of planets within the multiple-candidate systems discovered with the Kepler mission. We have compared the size of each planet to the size of every other planet within a given planetary system after correcting the sample for detection and geometric biases. We find that for planet pairs for which one or both objects are approximately Neptune-sized or larger, the larger planet is most often the planet with the longer period. No such size-location correlation is seen for pairs of planets when both planets are smaller than Neptune. Specifically, if at least one planet in a planet pair has a radius of ≳ 3 R_⊕, 68% ± 6% of the planet pairs have the inner planet smaller than the outer planet, while no preferred sequential ordering of the planets is observed if both planets in a pair are smaller than ≾ 3 R_⊕.

Additional Information

© 2013. The American Astronomical Society. Received 2012 October 8; accepted 2012 November 27; published 2013 January 4. Kepler was competitively selected as the 10th NASA Discovery mission. The authors thank the many people who have made Kepler such a success. This paper includes data collected by the Kepler mission; funding for the Kepler mission is provided by the NASA Science Mission directorate. 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. D.C.F. acknowledges NASA support through Hubble Fellowship grant HF-51272.01-A, awarded by STScI, operated by AURA under contract NAS 5-26555. D.R.C. thanks the referee, the Kepler team, Bill Borucki, Geoff Marcy, Stephen Kane, Peter Plavchan, Kaspar von Braun, Teresa Ciardi, and Jim Grubbs for very insightful and inspirational comments and discussions in the formation of this paper.

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Created:
August 19, 2023
Modified:
October 25, 2023