The Planetary System to KIC 11442793: A Compact Analogue to the Solar System
- Author(s)
- Juan Cabrera, Szilard Csizmadia, Holger Lehmann, Rudolf Dvorak, Davide Gandolfi, Heike Rauer, Anders Erikson, C. Dreyer, Ph. Eigmüller, A. Hatzes
- Abstract
We announce the discovery of a planetary system with seven transiting planets around a Kepler target, a current record for transiting systems. Planets b, c, e, and f are reported for the first time in this work. Planets d, g, and h were previously reported in the literature, although here we revise their orbital parameters and validate their planetary nature. Planets h and g are gas giants and show strong dynamical interactions. The orbit of planet g is perturbed in such a way that its orbital period changes by 25.7 hr between two consecutive transits during the length of the observations, which is the largest such perturbation found so far. The rest of the planets also show mutual interactions: planets d, e, and f are super-Earths close to a mean motion resonance chain (2:3:4), and planets b and c, with sizes below 2 Earth radii, are within 0.5% of the 4:5 mean motion resonance. This complex system presents some similarities to our solar system, with small planets in inner orbits and gas giants in outer orbits. It is, however, more compact. The outer planet has an orbital distance around 1 AU, and the relative position of the gas giants is opposite to that of Jupiter and Saturn, which is closer to the expected result of planet formation theories. The dynamical interactions between planets are also much richer.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Thüringer Landessternwarte Tautenburg, INAF-Osservatorio Astrofisico di Catania, Technische Universität Berlin
- Journal
- The Astrophysical Journal
- Volume
- 781
- No. of pages
- 13
- ISSN
- 0004-637X
- DOI
- https://doi.org/10.1088/0004-637X/781/1/18
- Publication date
- 01-2014
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Keywords
- ASJC Scopus subject areas
- Astronomy and Astrophysics, Space and Planetary Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/2c2a5de7-43f9-42aa-893c-a77856e40433