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- W2030608959 abstract "Abstract The O–C curve of the Algol-type eclipsing binary SW Cyg was analyzed using the Kalimeris method. The observed period variations with time, the P ( E ) function and its rate of change d P /d E , were calculated. The plots of O–C values as well as of P ( E ) and d P /d E against ephemeris ( E ) all show rather regular period variations in this system. To reveal any cyclic period variations, the P ( E ) function was subjected to Fourier analysis. A cyclic period change of average ≈27.8-yr duration was obtained. Also a relative mass transfer rate of Δ m / m = −1.1 × 10 −9 yr −1 was estimated. Finally the existence of a third companion is suggested, and possible causes of period variations in the system are discussed." @default.
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- W2030608959 date "2007-01-01" @default.
- W2030608959 modified "2023-09-27" @default.
- W2030608959 title "Orbital Period Modulation in SW Cygni" @default.
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- W2030608959 doi "https://doi.org/10.1071/as06024" @default.
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