Short-term variations of surface magnetism and prominences of the young Sun-like star V530 Per

Aims. We investigate magnetic tracers in the photosphere and the chromosphere of the ultra-rapid rotator ( P ~ 0.32 d) V530 Per, a cool member of the open cluster α Persei, to characterize the short-term variability of the magnetic activity and large-scale magnetic field of this prototypical young,...

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