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Measurement and study of the rotations of RS canum venaticorum binaries |
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| Authors: | Hui-song Tan Xue-fu Liu |
| Affiliation: | aYunnan Observatory, Academia Sinica, China bDepartment of Astronomy, Beijing Normal University, China |
| Abstract: | We measured the rotations of all the primaries and 5 of the secondaries in 33 RS CVn binary systems, using the three lines in the red region, FeI 6663, FeI 6678 and CaI 6718. A comparison with synchronous rotation shows that none of the systems observed (some with P > 14 d) contradicts the assumption of synchronous rotation, contrary to a previous view. |
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