Orbital determination and dynamics of resonant extrasolar planetary systems

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Abstract

In this communication we review some properties and applications of mean-motion resonances in extrasolar planetary systems, with particular emphasis on the 2/1 commensurability. A first part is devoted to the dynamical structure of the 2/1 resonance, including (but not restricted to) the so-called apsidal corotations. In a second part we discuss the orbital evolution of resonant systems under the effects of non-conservative forces. Special attention is given to the use of apsidal corotations as markers of largescale orbital decay, possibly due to disk-planet interactions in primordial times. Finally, we analyze the interplay between dynamical analysis and orbital fitting. Using the HD82943 planetary system as an example, we discuss: (i) up to what point present orbital fits allow us to distinguish between different resonant configurations, and (ii) in what ways may the dynamical structure of resonances be used as a complementary part of the orbital fitting process. © 2008 International Astronomical Union.

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APA

Beaugé, C., Ferraz-Mello, S., Michtchenko, T. A., & Giuppone, C. A. (2007). Orbital determination and dynamics of resonant extrasolar planetary systems. Proceedings of the International Astronomical Union, 3(S249), 427–440. https://doi.org/10.1017/S1743921308016943

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