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Introduction aux Résonances Orbitales Rétrogrades dans les Systèmes Multi-Planétaires

Abstract : Since the first detection of an exoplanet in 1995 (around a solar-type star), about 300 extrasolar planets and 25 multi-planetary systems have been observed until now. Most of these multi-planetary systems are characterized by hot-Jupiters close to their central star and moving on eccentric orbits. These particularities may lead to strong gravitational interactions between the planets. As a consequence, compact multi-planetary systems form a specific class of the general N-body problem. To explore the multi-dimensional parameter space of multi-planetary systems, specific numerical methods of global analysis were required in order to remedy the problem of great number of degrees of freedom of such systems. A dynamical checkup of several detected planetary system is then firstly proposed in this thesis.

Extrasolar planets are up to now a priori found in direct orbital motions about their host star. However, in this thesis, a theoretical alternative suitable for the stability of compact two-planet systems is investigated. Using a numerical method of global dynamics analysis, we explore theoretical systems in Mean Motion Resonance (MMR) harboring it counter-revolving planets (which means that one planet moves on a retrograde orbit). Besides, I have expand the Hamiltonian of the 3-body problem for the particular case of retrograde MMR. Consequently, the retrograde resonance is analysed from both a numerical and an analytical point of view. Furthermore, in order to study the observational feasibility of retrograde MMR, observational fits are performed for different detected systems. Finally, the formation of systems harboring counter-revolving planets is discussed.
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Submitted on : Wednesday, July 15, 2009 - 7:02:33 PM
Last modification on : Tuesday, December 7, 2021 - 4:10:03 PM
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  • HAL Id : tel-00404255, version 1



Julie Gayon-Markt. Introduction aux Résonances Orbitales Rétrogrades dans les Systèmes Multi-Planétaires. Astrophysique [astro-ph]. Université Nice Sophia Antipolis, 2008. Français. ⟨tel-00404255⟩



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