Low-amplitude variations detected by CoRoT in the late type Be star HD 175869
Garrido, R.; Frémat, Y.; Neiner, C.; Janot-Pacheco, E.; Floquet, M.; Martayan, C.; Emilio, M.; Gutiérrez-Soto, J.; Huat, A. -L.; Hubert, A. -M.; de Batz, B.; Leroy, B.; Andrade, L.; Diago, P. D.; Fabregat, J.; Suso, J.; Facanha, W.
Abstract
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 ppm are also found. The analysis of line profiles from ground-based spectroscopic data does not show any variation.