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| Paper: |
CoRoT Observations of O Stars: Diverse Origins of Variability |
| Volume: |
465, Four Decades of Massive Star Research - A Scientific Meeting in Honor of Anthony J. Moffat |
| Page: |
13 |
| Authors: |
Blomme, R.; Briquet, M.; Degroote, P.; Mahy, L.; Aerts, C.; Cuypers, J.; Godart, M.; Gosset, E.; Hareter, M.; Montalban, J.; Morel, T.; Nieva, M. F.; Noels, A.; Oreiro, R.; Poretti, E.; Przybilla, N.; Rainer, M.; Rauw, G.; Schiller, F.; Simon-Diaz, S.; Smolders, K.; Ventura, P.; Vučković, M.; Auvergne, M.; Baglin, A.; Baudin, F.; Catala, C.; Michel, E.; Samadi, R. |
| Abstract: |
Six O-type stars were observed continuously by the CoRoT satellite during a
34.3-day run. The unprecedented quality of the data allows us to detect even
low-amplitude stellar pulsations in some of these stars (HD 46202 and the
binaries HD 46149 and Plaskett's star). These cover both opacity-driven modes
and solar-like stochastic oscillations, both of importance to the
asteroseismological modeling of O stars. Additional effects can be seen
in the CoRoT light curves, such as binarity and rotational modulation. Some
of the
hottest O-type stars (HD 46223, HD 46150 and HD 46966) are dominated by the
presence of red-noise: we speculate that this is related to a sub-surface
convection zone. |
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