Asteroseismology of OB stars with the CoRoT space mission.

The CoRoT space telescope monitors the brightness of the stars continuously and with unprecedented quality. For the first time, variability measurements of massive stars have been obtained with micromagnitude precision, allowing for detailed seismic studies of hot stars in the instability strips to uncover the internal structure.After describing a wide range of relevant observational techniques to fully exploit the acquired data, we present analyses and seismic interpretations of specific stars observed by the CoRoT space as part of the seismology program. To achieve a full exploration of the instability strips, we traverse the Hertzsprung-Russel diagram from the hot to the cool side, via an O-type binary system and a Beta Cep star, to a hybrid pulsator and a small sample of late B-type stars.The discovery of solar-like oscillations in massive stars opens up the possibility of finding a new set of seismic constraints on massive star models. Via the detection of gravity mode period spacings, we were able to describe the mixing processes around the convective core of a massive star. Finally, the late type stars showed unexpected variability, possibly attributed to rotational modulation, e.g., due to spots on the surface of these stars.nrpages: 241status: publishe