AI 中文总结
本文结合地面观测与TESS测光，用BSN软件建模分析OV Leo和V339 Leo，发现二者为W型浅相接双星，周期变化相反，还推导了其绝对参数。
AI 中文摘要
我们结合地面观测与TESS测光数据，对相接双星系统OV Leo和V339 Leo开展测光与轨道周期的综合分析。利用BSN软件通过马尔可夫链蒙特卡罗方法对光变曲线进行建模，得到系统参数及其不确定度的物理估计值。首次对OV Leo开展测光分析，采用新观测数据与更新的建模方法重新研究V339 Leo。光变曲线分析显示，两个目标均为处于浅相接构型的W型相接双星。V339 Leo中探测到的O'Connell效应可通过冷星斑模型复现，而OV Leo无需引入星斑。三维几何模型进一步表明，OV Leo发生全食，V339 Leo则呈现偏食。基于食时提取的轨道周期分析显示，两个系统存在相反的长期周期变化，在保守质量转移假设下表明存在持续的质量转移。利用盖亚视差、测光光变曲线解及标准天体物理方程推导了绝对参数。
英文摘要
We present a combined photometric and orbital period analysis of the contact binary systems OV Leo and V339 Leo using ground-based observations together with TESS photometry. The light curves were modeled with the BSN software through a Markov Chain Monte Carlo approach, providing physical estimates of the system parameters and their uncertainties. OV Leo is analyzed photometrically for the first time, while V339 Leo is reexamined using new observations and an updated modeling methodology. The light curve analysis show that both targets are W-subtype contact binaries in shallow-contact configurations. The O'Connell effect detected in V339 Leo is reproduced with a cool starspot model, whereas no spot is required for OV Leo. Three-dimensional geometric models further indicate that OV Leo undergoes total eclipses, while V339 Leo exhibits partial eclipses. Orbital period analysis based on eclipse timing extractions reveals opposite long-term period variations in the two systems, suggesting ongoing mass transfer under the assumption of conservative mass transfer. The absolute parameters were derived using the Gaia parallaxes, the photometric light curve solution, and standard astrophysical equations.
CommentsAccepted by the Astrophysics journal
