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

Ciardi, David R. and Fabrycky, Daniel C. and Ford, Eric B and Gautier, T. N., III and Howell, Steve B. and Lissauer, Jack J and Ragozzine, Darin and Rowe, Jason F. (2013) On the Relative Sizes of Planets within Kepler Multiple-candidate Systems. Astrophysical Journal, 763 (1). Art. No. 41. ISSN 0004-637X.

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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_⊕.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Ciardi, David R.0000-0002-5741-3047
Fabrycky, Daniel C.0000-0003-3750-0183
Ford, Eric B0000-0001-6545-639X
Howell, Steve B.0000-0002-2532-2853
Lissauer, Jack J0000-0001-6513-1659
Rowe, Jason F.0000-0002-5904-1865
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.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
NASA Hubble FellowshipHF-51272.01-A
NASANAS 5-26555
Subject Keywords:planetary systems
Issue or Number:1
Record Number:CaltechAUTHORS:20170408-155111944
Persistent URL:
Official Citation:David R. Ciardi et al 2013 ApJ 763 41
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76081
Deposited By: 1Science Import
Deposited On:24 May 2017 00:23
Last Modified:09 Mar 2020 13:19

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