BSN-VIII：10个W UMa型相接双星的详细测光建模及修正的经验周期-质量关系
BSN-VIII: Detailed Photometric Modeling of Ten W UMa Contact Binaries and a Revised Empirical Period-Mass Relationship
浏览论文内容
中文总结 AI 辅助
本研究对10个W UMa型相接双星开展测光分析，结合多台站观测与TESS数据，用BSN建模并修正了短周期相接双星的经验周期-质量关系，揭示了轨道周期变化的成因。
中文摘要 AI 辅助
本研究延续了我们对接双星系统的持续研究，对10个目标开展详细分析。研究采用6个不同天文台的地基观测数据，结合TESS数据进行分析；观测获取的测光数据通过最新开发的AutoWISP管道处理，得到了具有可靠精度的高质量光变曲线用于分析。对轨道周期变化的研究发现，10个被分析的双星中有6个存在长期趋势，其中3个还显示出周期循环变化，4个目标的轨道周期基本恒定。长期趋势被归因于质量转移；3个系统的周期循环调制由磁活动周期或第三天体的光行时效应（LTTE）导致，剩余1个系统的循环变化仅由LTTE引起。研究使用BSN程序对10个目标双星的测光光变曲线进行建模，通过迭代拟合和MCMC优化得到了系统参数的可靠估计，对呈现O'Connell效应不对称性的系统应用了星斑建模。我们通过分析同质系统数据集，基于光谱子集推导了更新的主星质量校准，从而修正了短周期相接双星的经验轨道周期-质量关系；随后利用该校准关系估算了所研究系统的基本参数。
英文摘要
This study continues our ongoing research on contact binary systems by presenting a detailed analysis of 10 targets. Ground-based observations from six different observatories were conducted and used together with TESS data for the analysis process. Photometric data from our observations were reduced with the recently developed AutoWISP pipeline, yielding high-quality light curves with reliable precision for analysis. An investigation of orbital period variations identifies long-term trends in six of the ten analyzed binaries, including three that also display cyclic variations. Four targets show essentially constant orbital periods. The secular trends are attributed to mass transfer. The cyclic modulations in three systems are caused by either magnetic activity cycles or the Light-Travel Time Effect (LTTE) of a third body, while that in the remaining system is solely due to the LTTE. The BSN application was used to model the photometric light curves of the 10 target binaries. Iterative fitting and MCMC refinement provided robust estimates of the system parameters, while starspot modeling was applied for systems showing O'Connell-effect asymmetries. We refine the empirical orbital period-mass relationship for short-period contact binaries by analyzing a homogeneous dataset of systems and deriving an updated primary-mass calibration based on the spectroscopic subset. Using this calibrated relation, the fundamental parameters of the studied systems were subsequently estimated.
