Evolution of the magnetic field of Betelgeuse from 2009โ2017
Evolution of the magnetic field of Betelgeuse from 2009โ2017
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 polarization signal has been monitored over 7.5 years in order to follow its evolution on different timescales, and eventually to determine its โฆ