BVRI photometry of stars in Orion A

We extend our previous study of the stellar population of L1641, the lower-density star-forming region of the Orion A cloud south of the dense Orion Nebula Cluster (ONC), with...我们拓展了此前针对L1641的恒星族群（stellar population）的研究。L1641为猎户座A云（Orion A cloud）中的低密度恒星形成区，其坐落于致密猎户座星云星团(Orion Nebula Cluster, ONC)的南侧，本次研究将……