Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2011-01-24
Detection and Dynamics of Transiting Exoplanets, Haute Provence Observatory, Saint-Michel-l'Observatoire : France (2010)
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
8p
Scientific paper
A new element is proposed to play a role in the evolution of extrasolar planetary systems: the tidal (or elliptical) instability. It comes from a parametric resonance and takes place in any rotating fluid whose streamlines are (even slightly) elliptically deformed. Based on theoretical, experimental and numerical works, we estimate the growth rate of the instability for hot-jupiter systems, when the rotation period of the star is known. We present the physical process, its application to stars, and preliminary results obtained on a few dozen systems, summarized in the form of a stability diagram. Most of the systems are trapped in the so-called "forbidden zone", where the instability cannot grow. In some systems, the tidal instability is able to grow, at short timescales compared to the system evolution. Implications are discussed in the framework of mis-aligned transiting systems, as the rotational axis of the star would be unstable in systems where this elliptical instability grows.
Cébron David
Fares Rim
Le Bars Michael
Le Gal Patrice
Moutou Claire
No associations
LandOfFree
Tidal instability in systems' evolution does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Tidal instability in systems' evolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tidal instability in systems' evolution will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-637288