Ref: ASTROimport-925

CoRoT Observations of O Stars: Diverse Origins of Variability

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. ; Vuckovic, M. ; Auvergne, M. ; Baglin, A. ; Baudin, F. ; Catala, C. ; Michel, E. ; Samadi, R.

published in Proceedings of a Scientific Meeting in Honor of Anthony F. J. Moffat, 465, pp. 13 (2012)

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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Royal Observatory of Belgium > Astronomy & Astrophysics
Science Articles > Non-refereed Articles

 Record created 2016-07-01, last modified 2016-07-01