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CoRoT Reveals a Magnetic Activity Cycle in a Sun-Like Star

Metcalfe, Travis S.; García, Rafael A.; Mathur, Savita +4 more

The 11-year activity cycle of the Sun is a consequence of a dynamo process occurring beneath its surface. We analyzed photometric data obtained by the CoRoT space mission, showing solarlike oscillations in the star HD49933, for signatures of stellar magnetic activity. Asteroseismic measurements of global changes in the oscillation frequencies and …

CoRoT Measures Solar-Like Oscillations and Granulation in Stars Hotter Than the Sun

Neiner, Coralie; Baudin, Frédéric; Aerts, Conny +41 more

Oscillations of the Sun have been used to understand its interior structure. The extension of similar studies to more distant stars has raised many difficulties despite the strong efforts of the international community over the past decades. The CoRoT (Convection Rotation and Planetary Transits) satellite, launched in December 2006, has now measur…