7 papers
Seismic tests of accretion in central stars of planetary systems
Michael Bazot, Sylvie Vauclair
Central stars of extra-solar planetary systems are metal-rich. Planet accretion or initial surmetallicity can explain this observationnal fact. These scenarios can be tested with a…
Element stratification in main sequence stars and its effect on stellar oscillations
Sylvie Vauclair
The element settling due to the combined effects of gravity, thermal gradient, radiative acceleration and concentration gradient may lead to important abundance variations inside t…
Lithium abundances in main-sequence F stars and sub-giants
Jose Dias do Nascimento, Sylvie Theado, Sylvie Vauclair
The application to main-sequence stars of the rotation-induced mixing theory in the presence of mu-gradients leads to partial mixing in the lithium destruction region, not visible…
Transport Phenomena and Light Element Abundances in the Sun and Solar Type Stars
Sylvie Vauclair
The observations of light elements in the Sun and Solar type stars give special clues for understanding the hydrodynamical processes at work in stellar interiors. In the Sun 7Li is…
On the possible existence of a self-regulating hydrodynamical process in slowly rotating stars : I Setting the stage
Sylvie Vauclair
It has been known for a long time (Mestel 1953) that the meridional circulation velocity in stars, in the presence of mu-gradients, is the sum of two terms, one due to the classica…
Light Element Settling in Main-Sequence Pop II Stars and the Primordial Lithium Abundance
Sylvie Vauclair
While theoretical computations of the lithium abundances in Pop II stars predict variations from star to star, the most recent observations confirm the existence of a "lithium plat…