The Algol System XX Cephei
The Algol System XX Cephei
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Algol 系统 XX Cephei
DOI：
10.1086/501009
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
J. Sievers
中科院分区：
文献类型：
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作者：
R. Angione;J. Sievers
我们提出了大陵五系统 XX Cephei 的新五色光度和光谱观测（V = 9.13，P = 2.3 天）。众所周知，该系统具有可变周期。通过对周期变化和光变曲线的分析，我们发现不支持背面运动。然而，可能存在光时间效应。周期变化也可能是间歇性的。我们的光谱分析得出 A4 分类。我们没有发现任何证据表明冷却器组件或主动传质的特征。我们的光度解决方案使用 Wilson-Devinney 建模程序，表明该系统是质量比为 0.17 的 Algol 配置。我们确定质量和半径（以太阳单位为单位）为 M1 = 1.92、M2 = 0.33、R1 = 2.07 和 R2 = 2.32，温度为 T1 = 8500 K 和 T2 = 4555 K。根据依巴谷星表中给出的视差，忽略红化，确定了 MV = 1.73 和 4.43 的绝对星等分别为主要成分和次要成分。
We present new five-color photometric and spectroscopic observations of the Algol system XX Cephei (V = 9.13, P = 2.3 days). This system is known to have a variable period. From analysis of both the period variations and the light curve we found no support for apsidal motion. However, there is a possible light-time effect. The period changes could also be episodic. Our spectroscopic analysis yielded a classification of A4. We found no evidence of features attributable to the cooler component or of active mass transfer. Our photometric solution, using the Wilson-Devinney modeling program, showed the system to be an Algol configuration with a mass ratio of 0.17. We determined the masses and radii, in solar units, to be M1 = 1.92, M2 = 0.33, R1 = 2.07, and R2 = 2.32, and the temperatures to be T1 = 8500 K and T2 = 4555 K. From the parallax given in the Hipparcos catalog, neglecting reddening, absolute magnitudes of MV = 1.73 and 4.43 were determined for the primary and secondary components, respectively.