Stars 2 Stars: individual: proxima Centauri 2 Stars:imaging stars: imaging 2 Binaries:eclipsing 1 Chromophores 1 Doppler imaging 1 Eclipsing binaries 1 Field evolution 1 Independent measurement 1 Line: Profiles 1 Luminance 1 Magnetic fields 1 Magnetic-field 1 Magnetohydrodynamics 1 Measurements of 1 Orbits 1 Planets and satellites: formation 1 Radial velocity 1 Satellites 1 Spectroscopic analysis 1 Star: activity 1 Star: individual: AU microscopii 1 Star: individual: v471 tau 1 Stars: magnetic field 1 Techniques: polarimetric 1 Timing variations 1 binaries: eclipsing 1 planet and satellites: formation 1 stars: activity 1