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View article: First images of the Antares photosphere from spectropolarimetry
First images of the Antares photosphere from spectropolarimetry Open
Aims . 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 producing direct images of the photosphere, and hence probing the dynamics at the surface. …
View article: Measuring surface magnetic fields of red supergiant stars
Measuring surface magnetic fields of red supergiant stars Open
Context. Red supergiant (RSG) stars are very massive cool evolved stars. Recently, a weak magnetic field was measured at the surface of α Ori and this is so far the only M-type supergiant for which a direct detection of a surface magnetic …
View article: The evolution of surface magnetic fields in young solar-type stars – I. The first 250 Myr
The evolution of surface magnetic fields in young solar-type stars – I. The first 250 Myr Open
The surface rotation rates of young solar-type stars vary rapidly with age from the end of the pre-main sequence through the early main sequence. Important changes in the dynamos operating in these stars may result from this evolution, whi…