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• W3152901488 abstract "Abstract In this paper, we analyze the light variations of KIC 10975348 using photometric data delivered from the Kepler mission. This star is exceptionally faint ( K p = 18.6 mag) compared to most well-studied δ Scuti stars. The Fourier analysis of the short-cadence data (i.e., Q14, Q15, and Q16, spanning 220 days) reveals that the variations are dominated by the strongest mode with a frequency of F0 = 10.231899 day −1 , which is compatible with that obtained from RATS–Kepler. The other two independent modes with F1 (=13.4988 day −1 ) and F2 (=19.0002 day −1 ) are newly detected and have amplitudes two orders of magnitude smaller than F0. We note that, for the first time, this star is identified to be a high-amplitude δ Sct (HADS) star with an amplitude of about 0.7 mag, and the lower ratio of F0/F1 = 0.758 suggests that it might be a metal-rich variable star. The frequency F2 may be a third overtone mode, suggesting that this target might be a new radial triple-mode HADS star. We perform an O − C analysis using 1018 newly determined times of maximum light and derive an ephemeris formula of T max = 2456170.241912(0)+0.097734(1) × E . The O − C diagram shows that the pulsation period of KIC 10975348 seems to show no obvious change, which is in contrast to that of the majority of HADS stars. The possible cause of that may be due to the current short time span of the observations. To verify its possible period variations, regular observation from space with a longer time span in the future is needed." @default.
• W3152901488 created "2021-04-26" @default.
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• W3152901488 date "2020-12-11" @default.
• W3152901488 modified "2023-09-25" @default.
• W3152901488 title "KIC 10975348: A Double-mode or Triple-mode High-amplitude δ Scuti Star?" @default.
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• W3152901488 doi "https://doi.org/10.3847/1538-3881/abcb8b" @default.
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