The 12CO and 13CO lines data of 18,190 molecular clouds from the MWISP CO survey

The Milky Way Imaging Scroll Painting (MWISP) is an ongoing unbiased Galactic panel CO survey, which is performed using the 13.7m telescope of PMO and observes 12CO, 13CO, and C18O (J=1-0) lines simultaneously. The detailed introductions for the telescope, the multi-beam receiver system, observation mode, and data reduction procedures are described in Su et al. (2019). The half-power beam width (HPBW) for the telescope at 115 GHz is about 50 arcsec. The velocity separation is about 0.16 km s-1 for 12CO and 0.17 km s-1 for 13CO and C18O lines.We provide the 12CO(1-0) and 13CO(1-0) lines emission data for 18,190 molecular clouds. The 18,190 molecular clouds are identified using the 12CO(J=1-0) line data in the second Galactic quadrant with 104.75 < l < 150.25 degree, |b| < 5.25 degree and - 95 km s-1 < Vlsr < 25 km s-1 from the MWSIP CO survey, using the DBSCAN algorithm (Yan et al. 2021, Yuan et al. 2021). Among the 18,190 12CO molecular clouds, 2,851 12CO clouds have the 13CO molecular gas structures, which are also extracted using the DBSCAN within the boundaries of 12CO clouds (Yuan et al. 2022). The extracted 12CO lines data of 18,190 molecular clouds and the extracted 13CO lines data within the 2,851 12CO clouds are uploaded as the fits files. The corresponding images for each molecular cloud, including the 12CO and 13CO intensity maps integrated along with three different directions (l, b, v) and the averaged spectra of 12CO and 13CO lines, are also added. Two tables containing the parameters of angular areas, velocity span, peak intensities, and integrated fluxes of 12CO and 13CO line emission are also appended. A detailed description of the parameters of the tables is in the Yuan et al. 2021, 2022. In addition, the intensity maps of 12CO(1-0) and 13CO(1-0) emission in the second Galactic quadrant with 104.75 < l < 150.25 degree, |b| < 5.25 degree and - 95 km s-1 < Vlsr < 25 km s-1, which are integrated along velocity and latitude directions, are also uploaded as fits files.

银河系成像卷轴巡天（Milky Way Imaging Scroll Painting, MWISP）是一项正在推进的无偏银道面CO巡天项目，依托中国科学院紫金山天文台（PMO）13.7米射电望远镜开展，可同时观测12CO、13CO与C18O的J=1-0跃迁谱线。有关该望远镜、多波束接收机系统、观测模式以及数据归约流程的详细说明，可参见Su等人（2019）的研究成果。该望远镜在115 GHz频段的半功率波束宽度（half-power beam width, HPBW）约为50角秒；12CO谱线的速度采样间隔约为0.16 km s⁻¹，13CO与C18O谱线的速度采样间隔约为0.17 km s⁻¹。
本数据集提供了18190个分子云的12CO(1-0)与13CO(1-0)谱线辐射数据。这18190个分子云是基于第二银道象限区（银经104.75°<l<150.25°、银纬|b|<5.25°、局部星际速度Vlsr满足-95 km s⁻¹<Vlsr<25 km s⁻¹）的MWISP巡天12CO(J=1-0)数据，通过DBSCAN聚类算法识别得到（Yan等人，2021；Yuan等人，2021）。
在这18190个12CO分子云中，有2851个12CO分子云存在对应的13CO分子气体结构，该结构同样通过DBSCAN算法在12CO分子云的边界范围内提取得到（Yuan等人，2022）。
我们已将提取得到的18190个分子云的12CO谱线数据，以及2851个12CO分子云范围内的13CO谱线数据，存储为FITS格式文件并上传。此外，每个分子云对应的图像文件也已一并上传，包括沿银经、银纬、视向速度三个方向积分得到的12CO与13CO强度分布图，以及12CO和13CO谱线的平均光谱。同时附加了两份表格，分别记录了12CO与13CO谱线辐射的角面积、速度跨度、峰值强度与积分流量等参数；表格参数的详细说明可参考Yuan等人2021年与2022年的研究成果。
此外，我们还上传了第二银道象限区（银经104.75°<l<150.25°、银纬|b|<5.25°、局部星际速度Vlsr满足-95 km s⁻¹<Vlsr<25 km s⁻¹）内沿视向速度和银纬方向积分得到的12CO(1-0)与13CO(1-0)辐射强度分布图，该部分数据同样存储为FITS格式文件。

搜集汇总

背景与挑战

背景概述

该数据集包含来自MWISP CO巡天的18,190个分子云的12CO和13CO谱线数据，覆盖了银河系第二象限的特定区域。数据以FITS文件格式提供，包括强度图、平均光谱和相关参数表，适用于研究分子云的结构和动力学特性。