Orbital determination and dynamics of resonant extrasolar planetary systems
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.
- Publication:
-
Exoplanets: Detection, Formation and Dynamics
- Pub Date:
- May 2008
- DOI:
- 10.1017/S1743921308016943
- Bibcode:
- 2008IAUS..249..427B
- Keywords:
-
- celestial mechanics;
- planetary systems;
- planets and satellites: general