We present the results of our spectroscopic surveys of members of two nearby, rich open clusters, Praesepe and the Hyades, which fold in updated membership catalogs for both based on Gaia data. Our data include 1200 of our own R ≈ 2000 spectra (900 for Praesepe, 300 for the Hyades), 300 archival spectra (270 for Praesepe, 30 for the Hyades), and more than 1000 spectra obtained by the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (750 for Praesepe and 440 for the Hyades). For each good-quality spectrum, we measure the Hα equivalent width and run a Monte Carlo iterator to estimate the uncertainty. Our surveys include at least one spectrum for 870 stars in Praesepe and for 460 stars in the Hyades. The vast majority of these are stars later than F7 (<1.2 M _⊙). Our coverage extends down to a spectral type of M6 (≈0.2 M _⊙) in both clusters, allowing us to compare in detail the equivalent-width distributions for these two coeval populations (≈800 Myr). Our surveys represent the most extensive investigations of Hα emission in single-aged low-mass stellar populations to date, and form the basis of our exploration of the age-rotation-activity in these two benchmark clusters.

我们展示了我们对附近两个丰富的疏散星团 Praesepe 和 Hyades 成员的光谱调查结果，它们根据盖亚数据折叠在更新的成员目录中。我们的数据包括我们自己的 1200 个R  ≈ 2000 光谱（Praesepe 900，Hyades 300），300 个档案光谱（Praesepe 270，Hyades 30），以及大天空区域多目标获得的 1000 多个光谱光纤光谱望远镜（Praesepe 750 和 Hyades 440）。对于每个优质频谱，我们测量 H α等效宽度并运行蒙特卡罗迭代器来估计不确定性。我们的调查包括至少一个光谱，其中包括 Praesepe 中的 870 颗恒星和 Hyades 中的 460 颗恒星。其中绝大多数是晚于 F7 的恒星（<1.2  M _⊙ )。我们的覆盖范围向下延伸到两个星团中的 M6 光谱类型 (≈0.2  M _⊙ )，使我们能够详细比较这两个同时代种群 (≈800 Myr) 的等效宽度分布。我们的调查代表了迄今为止对单一年龄低质量恒星群中 H α发射的最广泛调查，并构成了我们探索这两个基准星团中年龄旋转活动的基础。