On the relation of changes of the period and brightness in the close binaries SWCygni and USagittae
نویسنده
چکیده
The analysis of the available data allows to conclude that changes of the orbital periods in both Algol-type systems, SW Cyg and U Sge, are correlated with the brightness variations of the late-type loser. The episodes of decrease of the orbital period are accompanied by minimum of brightness of the loser in both cases.
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