AI 中文总结
研究发现毕星团光谱双星的质量比分布与轨道倾角随机分布不一致，经Richardson-Lucy反卷积推导后证实其双峰分布，且与主星质量相关，凸显测光质量比推导的潜在陷阱。
AI 中文摘要
双星系统中恒星质量比q的分布为疏散星团的动力学历史和恒星形成过程提供了关键见解。本文重新评估了基于色-星等图中恒星位置得出的毕星团光谱双星样本的最新发表质量比分布（MRD），证明该研究推导的质量比与轨道倾角的随机分布统计不一致，且多个系统得出了非物理结果。通过对光谱质量函数应用Richardson-Lucy反卷积，并假设倾角呈随机分布，本文重新推导了该样本的MRD，表明其与均匀分布存在统计差异。进一步发现MRD与主星质量存在显著依赖关系：低质量主星系统在q≈1处呈现峰值，而高质量主星的分布则严重偏向低质量比（q≈0.15）。这些发现凸显了测光质量比推导的潜在陷阱，并强调需要通过Gaia DR4等未来数据发布进行进一步验证。
英文摘要
The distribution of stellar mass ratios, q, in binary systems provides critical insights into the dynamical history and star-formation processes of open clusters. Here, I re-evaluate the recently published mass ratio distribution (MRD) of a sample of spectroscopic binaries in the Hyades cluster, which was based on stellar positions in colour-magnitude diagrams. I demonstrate that the mass ratios derived in that work are statistically inconsistent with a random distribution of orbital inclinations. Furthermore, several systems yielded non-physical results. By applying a Richardson-Lucy deconvolution to the spectroscopic mass functions and assuming a random distribution of inclinations, I re-derive the MRD for this sample, showing that it is statistically different from a uniform distribution. I further find a significant dependence on the primary mass: systems with lower-mass primaries exhibit a peak near q~1, whereas more massive primaries show a distribution heavily skewed toward low mass ratios (q~0.15). These findings highlight the potential pitfalls of photometric mass ratio derivations and underscore the need for further verification with future data releases such as Gaia DR4.
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