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- W2104328117 abstract "We report photometric periodicities in the AM CVn system CP Eridani (CP Eri) of 1716.2 ± 0.2 and 1701.4 ± 0.2 s, obtained while the system was in quiescence. From a second observation obtained during superoutburst, we interpret the 1716-s signal as a superhump period (Psh) and the 1701-s signal as the orbital period (Porb) of the binary. The derived fractional superhump period excess ɛ adds CP Eri to a small collection of AM CVn stars with ɛ measured via time-series photometry of superhump and orbital periods. Plotting ɛ(Porb) for these systems, we find that AM CVn systems may, as expected, be evolving towards longer Porb. We discuss a technique of using ɛ to determine the degree of degeneracy of the donor star in a contact binary, and we show that for the AM CVn systems, the donor stars are well described by mass–radius relations of partially-degenerate objects." @default.
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- W2104328117 date "2012-03-01" @default.
- W2104328117 modified "2023-09-25" @default.
- W2104328117 title "Two photometric periods in the AM CVn system CP Eridani" @default.
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- W2104328117 doi "https://doi.org/10.1111/j.1365-2966.2012.20463.x" @default.
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