文章基本信息

标题：KIC 12602250: A Low-amplitude Double-mode Delta Scuti Star with Amplitude Modulation
本地全文：下载
作者：Chenglong Lv ; Ali Esamdin ; Xiangyun Zeng 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2021
卷号：162
期号：2
页码：1-6
DOI：10.3847/1538-3881/ac082b
语种：English
出版社：American Institute of Physics
摘要：We 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 f3, 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.