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Title:
V/R Variations of Binary Be Stars
Authors:
Štefl, S.; Okazaki, A. T.; Rivinius, T.; Baade, D.
Publication:
Active OB-Stars: Laboratories for Stellare and Circumstellar Physics, ASP Conference Series, Vol. 361, Proceedings of the conference held 29 August - 2 September, 2005 at Hokkai-Gakuen University, Sapporo, Japan. Edited by S. Stefl, S. P. Owocki, and A. T. Okazaki. San Francisco: Astronomical Society of the Pacific, 2007., p.274
Publication Date:
03/2007
Origin:
ASP
Bibliographic Code:
2007ASPC..361..274S

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 ζTau, 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 ɛ Cap is not identified.
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