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Close binary evolution based on Gaia DR2: the origin of late WC-type Wolf-Rayet stars with low luminosity
Weiguo Peng, Hanfeng Song, Georges Meynet +8
The observed late-type WC Wolf-Rayet stars (WC7-9) with low luminosity below in the HR diagram cannot be reproduced satisfactorily by the evolutionary…
News from Gaia on sigma Ori E: a case study for the wind magnetic braking process
H. F. Song, G. Meynet, A. Maeder +8
Sigma Ori E, a massive helium B-type star, shows a high surface rotation and a strong surface magnetic field potentially challenging the process of wind magnetic braking. The Gaia…
Star-planet interactions VI. Tides, stellar activity and planet evaporation
Suvrat Rao, Camilla Pezzotti, Georges Meynet +6
Tidal interactions and planet evaporation processes impact the evolution of close-in star-planet systems. We study the impact of stellar rotation on these processes. We compute the…
Blue supergiants as tests for stellar physics
Cyril Georgy, Hideyuki Saio, Georges Meynet
Massive star evolution is still poorly understood, and observational tests are required to discriminate between different implementations of physical phenomenon in stellar evolutio…
Convective core entrainment in 1D main sequence stellar models
L. J. A. Scott, R. Hirschi, C. Georgy +5
3D hydrodynamics models of deep stellar convection exhibit turbulent entrainment at the convective-radiative boundary which follows the entrainment law, varying with boundary penet…
Convective core sizes in rotating massive stars: I. Constraints from solar metallicity OB field stars
S. Martinet, G. Meynet, S. Ekström +11
Spectroscopic studies of Galactic O and B stars show that many stars with masses above 8 M are observed in the HR diagram just beyond the Main-Sequence (MS) band predicte…