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

January 2013 • 2013ApJ...763...41C

Authors • Ciardi, David R. • Fabrycky, Daniel C. • Ford, Eric B. • Gautier, T. N., III • Howell, Steve B. • Lissauer, Jack J. • Ragozzine, Darin • Rowe, Jason F.

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 _⊕.

Links

• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=2013ApJ...763...41C
• PDF https://iopscience.iop.org/article/10.1088/0004-637X/763/1/41/pdf
• PDF https://stacks.iop.org/0004-637X/763/41/pdf
• PREPRINT http://arxiv.org/abs/1212.1859
• DATA http://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/763/41
• DATA https://archive.stsci.edu/mastbibref.php?bibcode=2013ApJ...763...41C
• ELECTR https://doi.org/10.1088%2F0004-637X%2F763%2F1%2F41
• SPIRES http://inspirehep.net/search?p=find+eprint+arXiv:1212.1859