论文标题
两个低质量比触点二进制系统的双频带和调查光度法的分析
Analysis of Dual Band and Survey Photometry of Two Low Mass Ratio Contact Binary Systems
论文作者
论文摘要
该研究介绍了完全黯然失色的接触二进制系统TYC 8351-1081-1和ASAS J210406-0522.3的光度分析。 TYC 8351-1081-1是具有高度接触（F = 0.66）的极低质量比（Q = 0.086），而ASAS J210406-0522.3被发现处于边际接触（F = 0.08），相对较低的质量比为0.272。在两个系统中都有良好的热接触，其温度仅差异很小。在过去的20年中，许多天空调查都观察到了这些系统。我们比较了从最多三个调查的光曲线解决方案，发现手动分析的调查光度数据是稳健的，并且产生的结果可与专用的基于地面的光度法相媲美。有证据表明，TYC 8351-1081-1的光度从初级转移到次级，而ASAS J210406-0522.3为0.5LJ和0.06LJ。在过去的20年中，这两个系统的时期似乎都没有变化，并且在这两种情况下，理论角动量损失都低于当前测量阈值。我们还表明，在这两种情况下，质量比和分离远高于轨道不稳定性的理论值。正如预期的那样，相对于初级，次级成分的密度明显更高。
The study presents photometric analysis of the completely eclipsing contact binary systems TYC 8351-1081-1 and ASAS J210406-0522.3. TYC 8351-1081-1 is an extremely low mass ratio (q=0.086) system with high degree of contact (f=0.66) while ASAS J210406-0522.3 is found to be in marginal contact (f=0.08) with a relatively low mass ratio of 0.272. There is good thermal contact in both systems with only a small difference in the temperature of the components. The systems have been observed by a number sky surveys over the past 20 years. We compare the light curve solutions from up to three of these surveys and find that survey photometric data manually analysed is robust and yields results comparable to dedicated ground based photometry. There is evidence of significant luminosity transfer from the primary to the secondary, on the order of 0.5LJ for TYC 8351-1081-1 and 0.06LJ for ASAS J210406-0522.3. There appears to be no change in period of either system over the past 20 years and theoretical angular momentum loss is below current measurement threshold in both cases. We also show that the mass ratio and separation are well above the theoretical values for orbital instability in both cases. As would be expected, the density of the secondary components is significantly higher relative to the primary.
