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Synchronization of Components in Binary Systems

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Abstract—Two classical theories of synchronization of main-sequence components in binary systems developed by J.P. Zahn and J.-L. Tassoul are considered. These two theories predict significantly different synchronization time scales. Within the framework of this study, the times and probabilities of synchronization for a set of O–G-type model stars are estimated and compared with the results based on recent observational data from the catalog of detached eclipsing binaries by G. Torres. For each of the catalog objects, the maximum period of axial rotation is computed and compared with the known orbital period. A conclusion about the synchronization of each of the systems is then made based on the above theoretical estimates. Zahn’s theory, which yields longer synchronization time scales, is found to describe the observational data better than Tassoul’s theory. The results of this analysis will be useful for estimating the probability of synchronization in binary systems.

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ACKNOWLEDGMENTS

I am grateful to L.N. Berdnikov and A.Yu. Kniazev for their assistance with preparing this paper. This study used the TOPCAT service (Taylor, 2005).

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  1. Institute of Astronomy, Russian Academy of Sciences, 119017, Moscow, Russia

    P. V. Pakhomova

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  1. P. V. Pakhomova
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Correspondence to P. V. Pakhomova.

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Translated by A. Dambis

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Pakhomova, P.V. Synchronization of Components in Binary Systems. Astrophys. Bull. 77, 264–270 (2022). https://doi.org/10.1134/S1990341322030099

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