I have used high-precision photometry and astrometry from the second data release of the Gaia mission to perform a survey for young stars associated with the Lupus clouds, which have distances of ~160 pc and reside within the Sco-Cen OB association. The Gaia data have made it possible to distinguish Lupus members from most of the stars in other groups in Sco-Cen that overlap with the Lupus clouds, which have contaminated previous surveys. The new catalog of candidate Lupus members should be complete for spectral types earlier than M7 at A_K<0.2 within fields encompassing clouds 1--4. I have used that catalog to characterize various aspects of the Lupus stellar population. For instance, the sequence of low-mass stars in Lupus is ~0.4 mag brighter than the sequence for Upper Sco, which implies an age of ~6 Myr based an adopted age of 10-12 Myr for Upper Sco and the change in luminosity with age predicted by evolutionary models. I also find that the initial mass function in Lupus is similar to that in other nearby star-forming regions based on a comparison of their distributions of spectral types.

中文翻译：

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与狼疮云相关的年轻恒星的盖亚调查

我使用盖亚任务第二次数据发布的高精度光度测量和天体测量对与狼疮云相关的年轻恒星进行了调查，这些恒星的距离约为 160 pc，位于 Sco-Cen OB 协会内。盖亚数据使我们有可能将狼疮成员与 Sco-Cen 中与狼疮云重叠的其他星系群中的大多数恒星区分开来，而狼疮云已经污染了之前的调查。对于包含云 1--4 的区域内 A_K<0.2 的早于 M7 的光谱类型，候选狼疮成员的新目录应该是完整的。我已经使用该目录来描述狼疮恒星群体的各个方面。例如，Lupus 中的低质量恒星序列比 Upper Sco 的序列亮约 0.4 mag，这意味着约 6 Myr 的年龄基于 Upper Sco 所采用的 10-12 Myr 年龄以及进化模型预测的光度随年龄的变化。我还发现，基于光谱类型分布的比较，狼疮的初始质量函数与附近其他恒星形成区域的初始质量函数相似。