RASSCALS: X-ray and optical study

We describe the ROSAT All-Sky Survey Center for Astrophysics Loose Systems (RASSCALS), the largest X-ray and optical survey of low-mass galaxy groups to date. We draw 260 groups...本文对ROSAT全天巡天天体物理中心松散星系系统（ROSAT All-Sky Survey Center for Astrophysics Loose Systems，缩写RASSCALS）进行了介绍，该数据集是迄今规模最大的低质量星系群X射线与光学巡天项目。本研究共遴选得到260个星系群……