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A precontact binary and a shallow contact binary are in the same field

机译：预接触二进制和浅接触二进制在同一字段中

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The period changes of two close binaries, V1107 Cas and AXCas, which are in the same field, were investigated. Their periods both show a long-term decrease. After further analysis, we found that the periods have their respective cyclic oscillations (T-3 = 6.74 +/- 0.24 yr for V1107 Cas and T-3 = 13.8 +/- 0.3 yr for AXCas), which are possibly caused by a third body due to the light-time effect. We also obtained the complete VRcIc light curves for V1107 Cas and analyzed them with the 2010 version of the Wilson-Devinney code. The photometric results reveal that V1107 Cas is a W-type shallow contact (15.2% +/- 1.8%) binary, with a mass-ratio of 1.797 +/- 0.006. The period variation and photometric solution suggest that V1107 Cas is a newly formed contact binary system. Moreover, we estimated the fundamental parameters for V1107 Cas. They are: M-1 = 0.39 +/- 0.01M(circle dot), M-2 = 0.70 +/- 0.03 M-circle dot, R-1 = 0.52 +/- 0.10 R-circle dot, R-2 = 0.68 +/- 0.12 R-circle dot, L-1 = 0.178 +/- 0.108 L-circle dot, and L-2 = 0.196 +/- 0.116 L-circle dot. Then, based on the coplane assumption, we deduced the masses of possible third bodies to be M-3 = 0.091 +/- 0.019 M-circle dot for V1107 Cas and M-3 = 0.325 +/- 0.029 M-circle dot for AXCas. Finally, we inferred the evolutional stage of AXCas, and believe that it is a precontact binary. Thus, the precontact binary AXCas and the shallow contact binary V1107 Cas have adjoining evolutional stages.
机译：研究了在同一字段中的两个接近的二进制文件V1107 Cas和AXCas的周期变化。他们的时期都显示出长期下降。经过进一步分析，我们发现这些周期具有各自的周期性振荡（对于V1107 Cas，T-3 = 6.74 +/- 0.24 yr，对于AXCas，T-3 = 13.8 +/- 0.3 yr），可能是由第三次引起的。身体由于光照时间的影响。我们还获得了V1107 Cas的完整VRcIc光曲线，并使用2010版的Wilson-Devinney代码对其进行了分析。光度结果表明，V1107 Cas是W型浅触点（15.2％+/- 1.8％）的二元化合物，质量比为1.797 +/- 0.006。周期变化和光度学解决方案表明，V1107 Cas是一个新形成的接触二元系统。此外，我们估算了V1107 Cas的基本参数。它们是：M-1 = 0.39 +/- 0.01M（圆点），M-2 = 0.70 +/- 0.03 M圆点，R-1 = 0.52 +/- 0.10 R圆点，R-2 = 0.68 +/- 0.12 R圆点，L-1 = 0.178 +/- 0.108 L圆点和L-2 = 0.196 +/- 0.116 L圆点。然后，基于共平面假设，我们推论出可能的第三物体的质量，对于V1107 Cas，M-3 = 0.091 +/- 0.019 M圆点，对于AXCas，M-3 = 0.325 +/- 0.029 M圆点。最后，我们推断了AXCas的演变阶段，并认为它是预接触二进制文件。因此，预接触二进制AXCas和浅接触二进制V1107 Cas具有相邻的演化阶段。

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