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Lithium, masses, and kinematics of young Galactic dwarf and giant stars with extreme [/Fe] ratios
S. Borisov, N. Prantzos, C. Charbonnel
Recent spectroscopic explorations of large Galactic stellar samples stars have revealed the existence of red giants with [/Fe] ratios that are anomalously high, given their rela…
Discovery of a Metal-Poor Red Giant Star with the Highest Ultra-Lithium Enhancement
Jeremy Kowkabany, Rana Ezzeddine, Corinne Charbonnel +10
We present the discovery of 2MASS J05241392-0336543 (hereafter J0524-0336), a very metal-poor ([Fe/H]=-2.43 +- 0.16), highly r-process-enhanced ([Eu/Fe]= +1.34 +- 0.10) Milky Way h…
Lithium depletion and angular momentum transport in F-type and G-type stars in Galactic open clusters
Thibaut Dumont, Corinne Charbonnel, Ana Palacios +1
Open clusters provide clues to understand the evolution of Li7 at the surface of low-mass stars and its possible correlation with stellar rotation, which is a challenge for both st…
The Gaia-ESO survey: Mixing processes in low-mass stars traced by lithium abundance in cluster and field stars
L. Magrini, N. Lagarde, C. Charbonnel +42
We aim to constrain the mixing processes in low-mass stars by investigating the behaviour of the Li surface abundance after the main sequence. We take advantage of the data from th…
Pollux: A weak dynamo-driven dipolar magnetic field and implications for its probable planet
M. Aurière, P. Petit, P. Mathias +7
Context: Pollux is considered as an archetype of a giant star hosting a planet. We then discovered a weak magnetic field at its surface using spectropolarimetry. Aims and Methods:…
Lithium depletion and angular momentum transport in solar-type stars
T. Dumont, A. Palacios, C. Charbonnel +4
Transport processes occurring in the radiative interior of solar-type stars are evidenced by the surface variation of light elements, in particular Li, and the evolution of their r…