We present and analyze 120 spectroscopic binary and triple cluster members of the old (4 Gyr) open cluster M67 (NGC 2682). As a cornerstone of stellar astrophysics, M67 is a key cluster in the WIYN Open Cluster Study (WOCS); radial-velocity (RV) observations of M67 are ongoing and extend back over 45 yr, incorporating data from seven different telescopes, and allowing us to detect binaries with orbital periods ≲10⁴ days. Our sample contains 1296 stars (604 cluster members) with magnitudes of 10 ≤ V ≤ 16.5 (about 1.3–0.7 M _⊙), from the giants down to ∼4 mag below the main-sequence turnoff, and extends in radius to 30′ (7.4 pc at a distance of 850 pc, or ∼7 core radii). This paper focuses primarily on the main-sequence binaries, but orbital solutions are also presented for red giants, yellow giants, and sub-subgiants. Out to our period detection limit and within our magnitude and spatial domain, we find a global main-sequence incompleteness-corrected binary fraction of 34% 3%, which rises to 70% 17% in the cluster center. We derive a tidal circularization period of . We also analyze the incompleteness-corrected distributions of binary orbital elements and masses. The period distribution rises toward longer periods. The eccentricity distribution, beyond P _circ, is consistent with a uniform distribution. The mass-ratio distribution is also consistent with a uniform distribution. Overall, these M67 binaries are closely consistent with similar binaries in the galactic field, as well as with the old (7 Gyr) open cluster NGC 188. WOCS. 83.

我们展示并分析了旧（4 Gyr）疏散星团 M67（NGC 2682）的 120 个光谱二元和三元星团成员。作为恒星天体物理学的基石，M67是WIYN开放星团研究（WOCS）的关键星团；M67 的径向速度 (RV) 观测正在进行中，并且可以追溯到 45 年以上，结合了来自七个不同望远镜的数据，并使我们能够探测轨道周期≲ 10 ⁴天的双星。我们的样本包含 1296 颗星（604 个星团成员），星等为 10 ≤ V ≤ 16.5（约 1.3-0.7 M _⊙)，从巨星下降到主序截止点以下约 4 mag，并在半径上延伸到 30'（在 850 pc 的距离处为 7.4 pc，或约 7 核心半径）。本文主要关注主序双星，但也介绍了红巨星、黄巨星和亚次巨星的轨道解。在我们的周期检测极限以及我们的幅度和空间域内，我们发现全局主序列不完整校正二进制分数为 34% 3%，在聚类中心上升到 70% 17%。我们推导出潮汐循环周期。我们还分析了二元轨道元素和质量的不完整性校正分布。周期分布向更长的周期上升。偏心率分布，超出P _circ, 符合均匀分布。质量比分布也与均匀分布一致。总体而言，这些 M67 双星与银河系中的类似双星以及旧的（7 Gyr）疏散星团 NGC 188 非常一致。WOCS。83.