KIC 10736223: An Algol-type Eclipsing Binary That Has Just Undergone the Rapid Mass-transfer Stage

KIC 10736223: An Algol-type Eclipsing Binary That Has Just Undergone the Rapid Mass-transfer Stage
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KIC 10736223:刚刚经历快速传质阶段的大陵五型食双星

DOI:
10.3847/1538-4357/ab8bd2
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发表时间:
2020-04
影响因子:
4.9
通讯作者:
Han Zhanwen
Han Zhanwen
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Chen Xinghao;Zhang Xiaobin;Li Yan;Chen Hailiang;Luo Changqing;Su Jie;Chen Xuefei;Han Zhanwen

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本文报道了刚刚通过快速传质阶段的ALGOL系统KIC-10736223的发现。从光曲线和径向速度模拟中,我们发现KIc 10736223是一个分离的Algol系统,质量较小的次生星几乎填满了它的罗氏叶。基于短节奏开普勒数据,我们分析了脉动器的固有振荡,并确定了六种独立的δ刀型脉动模式(f1、f3、f9、f19、f42和f48)。我们计算了两个理论模型的网格来再现δ的Scuti频率,发现质量吸积模型的拟合结果与单星演化模型的结果很好地吻合。星震学测得的主星基本参数为M⊙,Z=0.009±0.001,R⊙,K,L=L⊙。星震参数与双星模型得到的动力学参数吻合较好。此外,我们的星震结果表明,脉动星是一颗几乎没有演化的恒星,对于单星演化模型来说,它的年龄在9.46到11.65 Myr之间,对于质量吸积模型来说,它的年龄在2.67-3.14 Myr之间。因此,KIC-10736223可能是一个刚刚经历快速传质过程的ALGOL系统。
This paper reports the discovery of an Algol system KIC 10736223 that just passed the rapid mass transfer stage. From the light-curve and radial-velocity modeling we find KIC 10736223 to be a detached Algol system with the less-massive secondary nearly filling its Roche lobe. Based on the short-cadence Kepler data, we analyzed intrinsic oscillations of the pulsator and identified six secured independent δ Scuti-type pulsation modes (f1, f3, f9, f19, f42, and f48). We compute two grids of theoretical models to reproduce the δ Scuti frequencies, and find that fitting results of mass-accreting models agree well with those of single-star evolutionary models. The fundamental parameters of the primary star yielded with asteroseismology are M⊙, Z = 0.009 ± 0.001, R⊙, , K, and L = L⊙. The asteroseismic parameters match well with the dynamical parameters derived from the binary model. Moreover, our asteroseismic results show that the pulsator is an almost unevolved star with an age between 9.46 and 11.65 Myr for single-star evolutionary models and 2.67–3.14 Myr for mass-accreting models. Therefore, KIC 10736223 may be an Algol system that has just undergone the rapid mass-transfer process.
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