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• W2573857095 abstract "The Kepler mission observations, taken in the long cadence mode, have a time resolution of about 30 min. In this paper, we investigate how the long cadence binning influences the shapes of the light curves of eclipsing binaries. A simulated light curve of a contact binary exhibiting a flat-bottom secondary minimum was applied for this purpose. We found that the binning caused a change in the variation amplitude and the shape of the minima. We modelled the simulated light curves corresponding to periods between 0.2 and 2 d using a code that does not account for binning and we derived the parameters. It turned out that only when the binary period is close to or longer than about 1.5 d are the solutions derived with such a code accurate. Rigorous modelling of systems with shorter periods requires the use of codes that do account for phase smearing due to long exposure times. We selected a sample of contact binaries observed by the Kepler mission, exhibiting a flat-bottom secondary minimum and showing no intrinsic activity. We solved the light curves of the sample with the most recent (2015) version of the Wilson–Devinney code and we derived the system parameters. The best models that we derived indicate that most of the systems in our sample have a deep contact configuration and that 13 out of 17 required the addition of a third light for good fits. Our results suggest that 13 systems could have tertiary companions." @default.
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• W2573857095 date "2017-01-20" @default.
• W2573857095 modified "2023-10-16" @default.
• W2573857095 title "The phase smearing effect in the light curves of contact binaries observed by the<i>Kepler</i>mission and the determination of the parameters of 17 contact systems" @default.
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• W2573857095 doi "https://doi.org/10.1093/mnras/stw3138" @default.
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