TX Cnc AS A MEMBER OF THE PRAESEPE OPEN CLUSTER

TX Cnc AS A MEMBER OF THE PRAESEPE OPEN CLUSTER
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TX Cnc 作为 PRAESEPE 开放集群的成员

DOI:
10.1088/0004-6256/138/2/680
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发表时间:
2009-08
影响因子:
5.3
通讯作者:
Zhang, X. B.
Zhang, X. B.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Lu, P.;Deng, L.;Zhang, X. B.

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我们提出了B-,V-和I-波段CCD测光的W UMa型双星系统TX Cnc,这是一个成员星星的Praesepe疏散星团。根据观测结果,推导出了新的星历表和修正的光度解。结合Pribulla等人提出的径向速度解的结果,确定了系统的绝对参数。主分量的质量、半径和光度分别为1.35 ± 0.02 M、1.27 ± 0.04 R和2.13 ± 0.11 L。次级星星的相应值分别为0.61 ± 0.01 M嫌、0.89 ± 0.03 R嫌和1.26 ± 0.07 L嫌。基于这些结果,我们确定了这颗星星的距离模数为(m-M)V = 6.34 ± 0.05。它确认TX Cnc是Praesepe疏散星团的成员。通过与理论模型的比较,讨论了该双星系统的演化状态和物理性质。
We present B-, V-, and I-band CCD photometry of the W UMa-type binary system TX Cnc, which is a member star of the Praesepe open cluster. Based on the observations, new ephemeris and a revised photometric solution of the binary system were derived. Combined with the results of the radial velocity solution contributed by Pribulla et al., the absolute parameters of the system were determined. The mass, radius, and luminosity of the primary component are derived to be 1.35 ± 0.02 M☉, 1.27 ± 0.04 R☉, and 2.13 ± 0.11 L☉. Those for the secondary star are computed as 0.61 ± 0.01 M☉, 0.89 ± 0.03 R☉, and 1.26 ± 0.07 L☉, respectively. Based on these results, a distance modulus of (m − M)V = 6.34 ± 0.05 is determined for the star. It confirms the membership of TX Cnc to the Praesepe open cluster. The evolutionary status and the physical nature of the binary system are discussed compared with the theoretical model.
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