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- W2024378255 abstract "We present a long-term photoelectric and charge-coupled device (CCD) photometric study of the short-period W UMa star V523 Cas made from 1986 to 2000. The orbital-period changes and light-curve variations of the binary system are studied. 47 new times of minima are obtained from our data. A period study covering more than 43 000 cycles based on the photoelectric and CCD photometric times of minima confirms the long-term, secular period changes of the system. It is found that the orbital period has been continuously increasing in the past three decades at a rate of dP/dt = 8.84 × 10 −8 dy r −1 . No cyclic period variations are found from our result. Eight V and five B completely covered light curves are formed from the observations made in eight epochs. The light curves are of W UMa type and show marked asymmetries with unequal maxima. The differences between the two maxima in each light curve appear to be cyclic over a time-scale of about 8 yr. Based on a one-spot model, the light curves are analysed with the Wilson‐Devinney code. The photometric solutions reveal a W-subtype, contact configuration for V523 Cas. The photometric mass ratio is found to be 0.51, and the" @default.
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- W2024378255 date "2004-01-01" @default.
- W2024378255 modified "2023-09-23" @default.
- W2024378255 title "Long-term photometric study of the W UMa binary star V523 Cas" @default.
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- W2024378255 doi "https://doi.org/10.1111/j.1365-2966.2004.07200.x" @default.
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