Influence of thermohaline convection on diffusion-induced iron accumulation in A stars (2009)
Théado, Sylvie, Vauclair, Sylvie, Alecian, Georges, LeBlanc, Francis
Atomic diffusion may lead to heavy element accumulation inside stars in certain specific layers. Iron accumulation in the Z-bump opacity region has been invoked by several authors to quantitatively...
What do stars tell us about planets? Asteroseismology of exoplanet-host stars (2008)
Studying the internal structure of exoplanet-host stars compared to that of similar stars without detected planets is particularly important for the understanding of planetary formation. The observed...
CS22964-161: A Double-Lined Carbon- and s-Process-Enhanced Metal-Poor Binary Star (2007)
Thompson, Ian B., Ivans, Inese I., Bisterzo, Sara, Sneden, Christopher, Gallino, Roberto, Vauclair, Sylvie, ...
A detailed high-resolution spectroscopic analysis is presented for the carbon-rich low metallicity Galactic halo object CS 22964-161. We have discovered that CS 22964-161 is a double-lined...
Helioseismic Constraints on the Solar Structure and the Solar Neutrino Problem (2007)
INTRODUCTION The study of the internal structure of the Sun entered a new age with helioseismology. Several ground based networks, as well as the space mission SOHO, continuously observe the solar...
Vauclair, Sylvie, Castro, Matthieu, Charpinet, Stephane, Laymand, Marion, Soriano, Melanie, Vauclair, Gerard, ...
Studying the internal structure of exoplanets-host stars compared to that of similar stars without detected planets is particularly important for the understanding of planetary formation. The...
Vauclair, Sylvie, Castro, Matthieu, Charpinet, Stephane, Laymand, Marion, Soriano, Melanie, Vauclair, Gerard, ...
Studying the internal structure of exoplanets-host stars compared to that of similar stars without detected planets is particularly important for the understanding of planetary formation. The...
Asteroseismology of exoplanets-host stars (2006)
Studying the internal structure of exoplanets-host stars compared to that of similar stars without detected planets is particularly important for the understanding of planetary formation. The...
Seismic tests of accretion in central stars of planetary systems (2005)
Bazot, Michael, Vauclair, Sylvie
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 asteroseismology. We...
Asteroseismology of the planet-hosting star $\mu$ Arae. I. The acoustic spectrum (2005)
Bouchy, Francois, Bazot, Michael, Santos, N.C., Vauclair, Sylvie, Sosnowska, Danuta
We present HARPS spectroscopy of mu Arae (HD160691) performed for studying the origin of the metallicity excess in this planet-hosting stars. The asteroseismologic campaign led to the previously...
Asteroseismology of the planet-hosting star $\mu$ Arae. I. The acoustic spectrum (2005)
Bouchy, Francois, Bazot, Michael, Santos, N.C., Vauclair, Sylvie, Sosnowska, Danuta
We present HARPS spectroscopy of mu Arae (HD160691) performed for studying the origin of the metallicity excess in this planet-hosting stars. The asteroseismologic campaign led to the previously...
Asteroseismology of the planet-hosting star $\mu$ Arae. I. The acoustic spectrum (2005)
Bouchy, Francois, Bazot, Michael, Santos, N. C., Vauclair, Sylvie, Sosnowska, Danuta
We present HARPS spectroscopy of mu Arae (HD160691) performed for studying the origin of the metallicity excess in this planet-hosting stars. The asteroseismologic campaign led to the previously...
Asteroseismology of the planet-hosting star $\mu$ Arae. I. The acoustic spectrum (2005)
Bouchy, Francois, Bazot, Michael, Santos, N.C., Vauclair, Sylvie, Sosnowska, Danuta
We present HARPS spectroscopy of mu Arae (HD160691) performed for studying the origin of the metallicity excess in this planet-hosting stars. The asteroseismologic campaign led to the previously...
Asteroseismology of the planet-hosting star $\mu$ Arae. I. The acoustic spectrum (2005)
Bouchy, Francois, Bazot, Michael, Santos, N.C., Vauclair, Sylvie, Sosnowska, Danuta
We present HARPS spectroscopy of mu Arae (HD160691) performed for studying the origin of the metallicity excess in this planet-hosting stars. The asteroseismologic campaign led to the previously...
Vauclair, Sylvie, Theado, Sylvie
Asteroseismology is found to be a excellent tool for detecting diffusion-induced helium gradients inside main-sequence A stars. Models have been computed for 1.6 and 2.0 M$_{\odot}$ stars with pure...
Element stratification in main sequence stars and its effect on stellar oscillations (2003)
The element settling due to the combined effects of gravity, thermal gradient, radiative acceleration and concentration gradient may lead to important abundance variations inside the stars, which...
Seismic tests of accretion in central stars of planetary systems (2003)
Bazot, Michael, Vauclair, Sylvie
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 asteroseismology. We...
While the metallicity excess observed in the central stars of planetary systems is confirmed by all recent observations, the reason for this excess is still a subject of debate : is it primordial, is...
Theado, Sylvie, Vauclair, Sylvie
In the first paper of this series, we discussed analytically, in an approximate way, the mixing processes which occur in slowly rotating stars when the feed-back effects due to the diffusion-induced...
Vauclair, Sylvie, Theado, Sylvie
In the presence of rotation-induced mixing, element diffusion still occurs in stellar radiative zones, although at a slower rate than in the case of a complete stability of the stellar gas. As a...
Theado, Sylvie, Vauclair, Sylvie
In the two previous papers of this series, we have discussed the importance of t he $\mu$-gradients due to helium settling on rotation-induced mixing, first in a n approximate analytical way, second...
Seismic tests of accretion in central stars of planetary systems (2003)
Bazot, Michael, Vauclair, Sylvie
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 asteroseismology. We...
Seismic tests of accretion in central stars of planetary systems (2003)
Bazot, Michael, Vauclair, Sylvie
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 asteroseismology. We...
Theado, Sylvie, Vauclair, Sylvie
The lithium plateau observed in halo stars has long appeared as a paradox in the general context of the lithium abundance behavior in stellar outer layers. First, the plateau is flat, second, the...
Transport Phenomena and Light Element Abundances in the Sun and Solar Type Stars (2000)
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 depleted by 140...
Theado, Sylvie, Vauclair, Sylvie
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 classical thermal imbalance...
Lithium abundances in main-sequence F stars and sub-giants (2000)
Theado, Sylvie, Vauclair, Sylvie
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 in the atmosphere....
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 classical thermal imbalance...
Light Element Settling in Main-Sequence Pop II Stars and the Primordial Lithium Abundance (1999)
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 plateau" with no...
Element Settling in the Solar Interior (1998)
Element settling inside the Sun now becomes detectable from the comparison of the observed oscillation modes with the results of the theoretical models. This settling is due, not only to gravitation,...
Consistent Solar Models Including the $^7$Li and $^3$He Constraints (1998)
Vauclair, Sylvie, Richard, Olivier
Improvements induced by helioseismology show that microscopic diffusion cannot be neglected in solar models. Helium and metal diffusion is now generally introduced in the computations. They cannot...
Element Segregation in Low Metallicity Stars and the Primordial Lithium Abundance (1998)
Vauclair, Sylvie, Charbonnel, Corinne
Observational constraints on the primordial lithium abundance are important for the evaluation of the baryonic density of the universe. Its precise determination however suffers from uncertainties...
13th Advanced Course of the Swiss Society for Astrophysics and Astronomy (1990)
Cox, A N, Hauck, B, Maeder, A, Vauclair, Sylvie, Zahn, Jean Paul
"Observatoire de Paris-Meudon, Département d'Astrophysique fondamentale"--Cover.