EAS Publications Series
Volume 42, 2010Extrasolar Planets in Multi-Body Systems: Theory and Observations
|Page(s)||287 - 290|
|Published online||19 April 2010|
K. Goździewski, A. Niedzielski and J. Schneider (eds)
EAS Publications Series, 42 (2010) 287-290
On the Super-Earths locked in the 3:2 mean-motion resonance
Faculty of Mathematics and Physics, University of
Szczecin Wielkopolska 15, 70-451 Szczecin, Poland
2 CASA and Institute of Physics, University of Szczecin, Wielkopolska 15, 70-451 Szczecin, Poland
The first study of migration-induced resonances in a pair of Earth-like planets has been performed by Papaloizou & Szuszkiewicz (2005). They concluded that in the case of disparate masses embedded in a disc with the surface density expected for a minimum mass solar nebula at 5.2 au, the most likely resonances are ratios of large integers, such as 8:7. For equal masses, planets tend to enter into the 2:1 or 3:2 resonance. In Papaloizou & Szuszkiewicz (2005) the two low-mass planets have masses equal to 4 Earth masses, chosen to mimic the very well known example of two pulsar planets which are close to the 3:2 resonance. That study has stimulated quite a few interesting questions. One of them is considered here, namely how the behaviour of the planets close to the mean-motion resonance depends on the actual values of the masses of the planets. We have chosen a 3:2 commensurability and investigated the outcome of an orbital migration in the vicinity of this resonance in the case of a pair of equal mass super-Earths, whose mass is either 5 or 8 Earth masses.
© EAS, EDP Sciences, 2010
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