Astronomy and Astrophysics – Astronomy
Scientific paper
May 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dda....41.0408l&link_type=abstract
American Astronomical Society, DDA meeting #41, #4.08; Bulletin of the American Astronomical Society, Vol. 41, p.929
Astronomy and Astrophysics
Astronomy
Scientific paper
With the discovery during the past decade of a large number of extrasolar planets orbiting their parent stars at distances lower than 0.1 astronomical unit, it is now needed to describe the dynamical evolution of planetary systems by taking into account numerous fine effects in particular when analyzing tidal interactions. This issue is usually studied within the punctual approximation for the tidal perturber. The purpose of this paper is to examine the step beyond this traditional approach by considering the tidal perturber as an extended body with arbitrary dissipation's function. We focus on the consequences on the orbital dynamics as well as the precession of the bodies. Then considering the specific case of fluid bodies, we propose a MHD modeling to calculate properly the shape of the bodies due to tides. It leads us to a global modeling enabling us to determine shape's evolution and dynamics of bodies simultaneously.
Le Poncin-Lafitte Christophe
Mathis Stephane
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