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Paper: V/R Variations of Binary Be Stars
Volume: 361, Active OB-Stars: Laboratories For Stellar and Circumstellar Physics
Page: 274
Authors: Stefl, S.; Okazaki, A.T.; Rivinius, T.; Baade, D.
Abstract: The analysis of V/R and RV Hα variations is carried out for selected Be binary systems, monitored over 8-12 years. The V/R variations can exhibit quasi-periodic cycles or periodic variations locked to the orbital periods or their combination. The triple-peak profiles appear at a given phase of the V/R cycle in ζ Tau, independently of the orbital phase, and cannot be fitted by profiles computed for the model of global disk oscillations. Except for a few cases caused by radiational excitation, the mechanism locking the V/R variations to the orbital period in stars like 4 Her and ε Cap is not identified.
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