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Preliminary results on the pulsations of Be stars with CoRoT
Frémat, Y.; Neiner, C.; Janot-Pacheco, E. +13 more
We present preliminary results of the study of pulsations of Be stars from CoRoT observations. CoRoT detected many pulsation frequencies in all observed Be stars, usually interpreted in terms of g-modes but sometimes also corresponding to p-modes. Even in late Be stars, for which the detection of pulsation frequencies is very difficult from the gr…
Space observations of B stars with CoRoT
Auvergne, M.; Deleuil, M.; Jorda, L. +20 more
We present the preliminary results of the exploration of pulsating B stars observed with the CoRoT space mission. The previously known group of Slowly Pulsating B stars gains a substantial amount of new candidates, offering the opportunity to test stellar models beyond individual cases. Besides these well-defined stars, the analysis of other B sta…
Low-amplitude variations detected by CoRoT in the late type Be star HD 175869
Garrido, R.; Frémat, Y.; Neiner, C. +14 more
We present the analysis of the CoRoT data of the B8IIIe star HD 175869 observed during a short run (27.3 days). The light curve shows low-amplitude variations of the order of 0.3 mmag. A frequency within the range determined for the rotational frequency and its 5 harmonics are detected. Other significant frequencies with a low amplitude of a few p…
The true Blazhko behaviour of DM Cyg
Hurta, Zs.
We present preliminary results of our work on DM Cyg, an RRab star with steadily increasing pulsation period. The Blazhko modulation of the light curve of DM Cyg has not been undoubtedly confirmed yet. A reanalysis of the original data (Sódor & Jurcsik 2005) could not confirm the 26 d periodicity found by Lysova & Firmanyuk (1980) in the t…