Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2011-09-20
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
26 pages, 15 figures, accepted for publication in ApJ
Scientific paper
The early evolution of planetary systems is expected to depend on various periods of disk matter accretion onto the central star, which may include the accretion of metal-rich matter after the star settles on the main sequence. When this happens, the accreted material is rapidly mixed within the surface convective zone and induces an inverse mean-molecular-weight gradient, unstable for thermohaline convection. The induced mixing, which dilutes the metal excess, may also have important consequences on the light elements abundances. We model and analyze this process, and present the results according to various possible accretion scenarios. We give a detailed discussion of the different ways of treating thermohaline mixing, as proposed by previous authors, and we converge on a consistent view, including the most recent numerical simulations. We show how the observations of light elements in stars can be used as tracers of such events.
Theado Sylvie
Vauclair Sylvie
No associations
LandOfFree
Metal-rich accretion and thermohaline instabilities in exoplanets-host stars: consequences on the light elements abundances 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 Metal-rich accretion and thermohaline instabilities in exoplanets-host stars: consequences on the light elements abundances, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metal-rich accretion and thermohaline instabilities in exoplanets-host stars: consequences on the light elements abundances will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-146787