Talk abstract details

Observations of B stars from CoRoT's asteroseismology programme
P. Degroote et al.

Abstract

The CoRoT satellite is revolutionizing photometric observations of B stars. During its long runs, CoRoT observed the entire main sequence B star regime, from typical hot Beta Cephei stars, via cooler hybrid p- and g-mode pulsators to the SPB stars near the edge of the instability strip. Past the main sequence, also a B supergiant has been intensively measured. CoRoT lowers the sensitivity barrier from the typical mmag-precision reached from the ground, to the $\mu$mag-level reached from space. Within the wealth of detected and identified pulsation modes, relations have been found in the form of multiplets, combination frequencies, and frequency- and period spacings. This will allow to put strong constraints on stellar evolution models. Aside from the expected opacity driven modes with infinite lifetime, other unexpected types of variability are detected in B stars, such as modes of stochastic nature. The simultaneous observation of all these light-curve characteristics imply a challenge for both observational asteroseismology and stellar modelling.