495 citations · 1.8k across the 29 of their papers we have counts for
29 papers
First images of Antares photosphere from spectropolarimetry
Quentin Pilate, Eric Josselin, Agnès Lèbre +3
Antares is the closest red supergiant (RSG) to Earth. The discovery of linear polarization in the atomic lines of the star opens the path to produce direct images of the photospher…
Surface magnetism in the pulsating RV Tauri star R Scuti
Stefan Georgiev, Agnès Lèbre, Eric Josselin +3
We present the surface magnetic field conditions of the brightest pulsating RV Tauri star, R Sct. Our investigation is based on the longest spectropolarimetric survey ever performe…
Three-dimensional imaging of convective cells in the photosphere of Betelgeuse
A. López Ariste, S. Georgiev, Ph. Mathias +5
Understanding convection in red supergiants and the mechanisms that trigger the mass loss from these evolved stars are the general goals of most observations of Betelgeuse and its…
Determining rotational and macroturbulent velocities of cool magnetic giant stars
Stefan Georgiev, Agnès Lèbre, Eric Josselin +2
An original method of estimating the projected rotational velocity, , and the macroturbulent velocity, , of evolved M giant stars is presented. It is based on t…
Convective cells in Betelgeuse: imaging through spectropolarimetry
A. López Ariste, P. Mathias, B. Tessore +7
We assess the ability to image the photosphere of red supergiants and, in particular Betelgeuse, through the modelling of the observed linear polarization in atomic spectral lines.…
Evolution of the magnetic field of Betelgeuse from 2009 - 2017
P. Mathias, M. Aurière, A. López Ariste +14
Betelgeuse is an M-type supergiant that presents a circularly polarized (Stokes V) signal in its line profiles, interpreted in terms of a surface magnetic field. The weak circular…