Investigations of MWISP Clumps. I. 13CO Clump Source Catalog and Physical Properties

We present the first comprehensive catalogs of 13CO clumps from the Milky Way Imaging Scroll Painting (MWISP) project. By developing an equivalent global detection scheme integrated with the FacetClumps algorithm, we successfully extract 71,661 molecular clumps across a high-resolution 13CO data cube spanning 2310 deg2 from the MWISP Phase I survey. To determine accurate distances, we design an automatic hierarchical distance decision method using signal regions as fundamental objects, effectively resolving the kinematic distance ambiguity problem and obtaining reliable measurements for 97.94% of the sample. These extensive catalogs establish a foundation for investigating molecular clump properties, star formation processes, and Galactic evolution.

本研究发布了首套源自银河系成像卷轴计划（Milky Way Imaging Scroll Painting，MWISP）的13CO（碳-13一氧化碳）云团综合目录。本研究通过开发与FacetClumps算法相集成的统一全局探测方案，从MWISP第一阶段巡天的2310平方度高分辨率13CO数据立方体中，成功提取出71661个分子云团。为获取精确距离，本研究设计了以信号区域为基本对象的自动化层级距离判定方法，有效解决了运动学距离歧义问题，为97.94%的样本获得了可靠的距离测量结果。这套完备的综合目录为研究分子云团性质、恒星形成过程以及银河系演化奠定了重要基础。