Using photometric data collected by Evryscope-South, we search for nearby young variable systems on the upper main sequence and pre-main sequence. The Evryscopes are all-sky high-cadence telescope arrays operating in the Northern and Southern hemispheres. We base our search on a Gaia-selected catalog of young neighborhood upper- and pre-main sequence stars which were chosen through both astrometric and photometric criteria. We analyze 44,971 Evryscope-South light curves in search of variability. We recover 615 variables, with 378 previously known, and 237 new discoveries including 84 young eclipsing binaries (EB) candidates. We discover a new highly-eccentric close binary system and recover a further four previously known systems, with periods ranging from 299-674 hours. We find 158 long-period (> 50 hours) candidate EB systems, 9 from the pre-main-sequence and 149 from the upper main sequence, which will allow constraints on the mass/radius/age relation. These long-period EBs include a 179.3 hour pre-main sequence system and a 867.8 hour system from the upper main sequence. For pre-main sequence variable candidates we estimate system ages, which range from 1 to 23 Myr for non-EBs and from 2 to 17 Myr for EBs. Other non-EB discoveries that show intrinsic variability will allow relationships between stellar rotation rates, ages, activity, and mass to be characterized.

中文翻译：

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Evryscope-南主序星邻星巡天

使用 Evryscope-South 收集的光度数据，我们在主序上层和主序前寻找附近的年轻变星系统。Evryscopes 是在北半球和南半球运行的全天高频率望远镜阵列。我们的搜索基于盖亚选择的年轻邻域上主序星和前主序星的目录，这些恒星是通过天体测量和光度测量标准选择的。我们分析了 44,971 条 Evryscope-South 光变曲线以寻找可变性。我们恢复了 615 个变量，其中 378 个以前已知，以及 237 个新发现，包括 84 个年轻的食双星 (EB) 候选对象。我们发现了一个新的高度偏心的封闭双星系统，并恢复了另外四个以前已知的系统，周期从 299 小时到 674 小时不等。我们找到了 158 个长期（> 50 小时）候选 EB 系统，9个来自前主序，149个来自上主序，这将允许对质量/半径/年龄关系进行限制。这些长周期 EB 包括一个 179.3 小时的前主序系统和一个来自主序上部的 867.8 小时系统。对于主序前候选变量，我们估计系统年龄，非 EB 的范围为 1 到 23 Myr，EB 的范围为 2 到 17 Myr。其他显示内在可变性的非 EB 发现将允许表征恒星旋转速率、年龄、活动和质量之间的关系。非 EB 的范围为 1 到 23 Myr，EB 的范围为 2 到 17 Myr。其他显示内在可变性的非 EB 发现将允许表征恒星旋转速率、年龄、活动和质量之间的关系。非 EB 的范围为 1 到 23 Myr，EB 的范围为 2 到 17 Myr。其他显示内在可变性的非 EB 发现将允许表征恒星旋转速率、年龄、活动和质量之间的关系。