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Título

KIC 12602250: A Low-amplitude Double-mode Delta Scuti Star with Amplitude Modulation

AutorLv, Chenglong; Esamdin, Ali; Zeng, Xiangyun; Pascual Granado, J.; Yang, Taozhi; Liu, Junhui CSIC
Fecha de publicación8-jul-2021
EditorIOP Publishing
CitaciónAstronomical Journal 162(2): 48 (2021)
ResumenWe report a detailed light-curve analysis of the Kepler target Kepler Input Catalog (KIC) 12602250. The results show that KIC 12602250 is a low-amplitude radial double-mode δ-Scuti star with amplitude modulation. The Fourier analysis of the long cadence data (i.e., Q0 - Q17, spanning 1471 days) reveals that the variations of the light curve are dominated by the strongest mode with frequency F0 = 11.6141 d-1, suggesting that KIC 12602250 is a δ-Scuti star. The other independent mode F1 = 14.9741 d-1 is newly detected. The amplitude of the light variations of KIC 12602250 is ∼0.06 mag, which indicates that this is a low-amplitude δ-Scuti star; but the ratio of F0/F1 is estimated as 0.7756, which is typical of HADS, and a slow amplitude growth is detected in F1 and f 3, which could be due to stellar evolution, suggesting that KIC 12602250 could be a post-main-sequence δ Scuti that is crossing the instability strip for the first time. © 2021. The American Astronomical Society.
Versión del editorhttp://dx.doi.org/10.3847/1538-3881/ac082b
URIhttp://hdl.handle.net/10261/256646
DOI10.3847/1538-3881/ac082b
ISSN0004-6256
E-ISSN1538-3881
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