Molecular clouds in the Outer Galaxy identified from the MWISP survey

Using the density-based spatial clustering of applications with the noise algorithm, the CO data cubes from the Milky Way Imaging Scroll Painting project were decomposed into a set of discrete molecular clouds. A total of 32,162 molecular clouds are identified, covering the northern Outer Galactic plane (l = [15◦,165◦] and l = [195◦,230◦], and b=[−5.◦25,+5.◦25]). The table includes the basic properties for each molecular cloud. Column 1: cloud number. Columns 2-4: the Galactic coordinates and LSR velocity of the cloud centroid. Column 5: velocity dispersion. Columns 6-8: the Galactic coordinates and LSR velocity of CO emission peak. Column 9: peak main-beam temperature. Column 10: angular area of the cloud. Column 11: total flux of the cloud. Columns 12-13: heliocentric and Galactocentric distance. Columns 14-20: effective radius, excitation temperature, mass, mass surface density, virial parameter, mean H2 number density, internal pressure of the cloud. Column 21: “Y” indicates the cloud is resolved (satisfying the Area≥2.5×2.5 arcmin2 criterion), and “N” indicates the cloud is unresolved. 32,162 12CO molecular clouds that covers the northern Outer Galactic plane8(l = [15◦,165◦] and l = [195◦,230◦], and b=[−5.◦25,+5.◦25]).162 12CO molecular clouds that covers the northern Outer Galactic plane8(l = [15◦,165◦] and l = [195◦,230◦], and b=[−5.◦25,+5.◦25]).

利用基于密度的带噪声应用空间聚类算法（Density-Based Spatial Clustering of Applications with Noise），将银河系成像长卷项目（Milky Way Imaging Scroll Painting project）的CO数据立方体分解为一系列离散的分子云。共识别出32162个分子云，覆盖北外星银道面区域（银经l = [15°，165°]及l = [195°，230°]，银纬b = [−5.25°，+5.25°]）。该表包含每个分子云的基本属性：第1列：云编号；第2-4列：云质心的银道坐标及本地静止标准速度（LSR velocity）；第5列：速度弥散；第6-8列：CO发射峰的银道坐标及本地静止标准速度；第9列：主峰束温度；第10列：云的角面积；第11列：云的总流量；第12-13列：日心距及银心距；第14-20列：有效半径、激发温度、质量、质量面密度、维里参数、平均H₂数密度、云的内部压强；第21列："Y"表示云已被解析（满足面积≥2.5×2.5角分²的标准），"N"表示未解析。32162个12CO分子云覆盖北外星银道面区域（银经l = [15°，165°]及l = [195°，230°]，银纬b = [−5.25°，+5.25°]）。162个12CO分子云覆盖北外星银道面区域（银经l = [15°，165°]及l = [195°，230°]，银纬b = [−5.25°，+5.25°]）。