2026-10-13T09:16:13Z https://www.scidb.cn/oai

10.57760/sciencedb.07765 2025-06-30T09:55:35Z

2025-06-30 Physical properties of molecular structures in the G220 region doi:10.57760/sciencedb.07765 en We present a catalog of molecular structures identified from the 12CO/13CO/C18O (J=1-0) data in a portion of the third Galactic quadrant (TGQ): l = [219.75, 229.75] deg and b = [-5.25, 5.25] deg. The high-resolution and high-sensitivity datasets are provided by the ongoing Milky Way Imaging Scroll Painting (MWISP) project [1]. The cloud structure identification approach, developed by Yan et al. (2020) [2], is based on the density-based spatial clustering of applications with noise (DBSCAN) algorithm. In total, we identified 1,502 12CO, 570 13CO, and 53 C18O molecular structures and estimated their physical properties, which we present here as a table file.The physical properties listed in the table are as follows: index, name, average LSR velocity and its dispersion, Galactic Longitude and its dispersion, Galactic Latitude and its dispersion, average integrated intensity, peak main-beam brightness temperature, heliocentric distance, effective radius, area, mass, mass surface density, virial mass, virial parameter, spiral arm, emission line, and matching 12CO structure index. Their units and detailed descriptions can be found in the table file.For python users, the table can be easily read using the astropy package:>>> from astropy.table import Table>>> data = Table.read('G220.txt', format='ascii.cds',fill_values=[('--', np.nan)])[1] Yang Su et al. 2019 ApJS 240 9[2] Qing-Zeng Yan et al. 2020 ApJ 898 80 MWISP project; CO; Molecular structure Yiwei Dong Yan Sun Ye Xu Zehao Lin Shuaibo Bian Chaojie Hao Dejian Liu Yingjie Li Ji Yang Yang Su Xin Zhou Shaobo Zhang Qing-Zeng Yan Zhiwei Chen PUBLIC https://creativecommons.org/licenses/by-sa/4.0/ dataset http://www.doi.org/10.3847/1538-4365/acde81 Science Data Bank