2026-10-12T15:34:43Z https://www.scidb.cn/oai

10.57760/sciencedb.0135a 2026-09-28T10:45:58Z

2026-09-28 Catalog of 4916 ¹³CO Molecular Clouds from the MWISP Survey Identified with GDCluster doi:10.57760/sciencedb.0135a en This dataset provides the catalog of 4916 ¹³CO (J = 1–0) molecular clouds used in "How Intensity Threshold Shapes the Velocity Dispersion–Size Relation in Molecular Clouds" (Qi, Liu & Du, [journal/DOI to be added]). The clouds were identified from the Milky Way Imaging Scroll Painting (MWISP) survey, covering the second Galactic quadrant (104.75° ≤ l ≤ 150.25°, −5.25° ≤ b ≤ 5.25°), using the GDCluster algorithm (Liu & Du 2025), which incorporates spatial-continuity constraints during Gaussian decomposition and clustering to separate kinematically blended velocity components.Kinematic distances were derived from the line-of-sight velocity (VLSR) using the Galactic rotation curve model of Reid et al. (2019). Clouds with |VLSR| < 10 km/s were excluded to ensure reliable distance estimates, leaving the final sample of 4916 clouds reported here.Each entry corresponds to a cloud's native GDCluster boundary (prior to any intensity-threshold reprocessing described in the paper) and includes its Galactic coordinates, centroid velocity, kinematic distance, effective radius, velocity dispersion, peak brightness temperature, voxel count, and a velocity-group label (corresponding to the two spiral-arm subgroups defined by VLSR = −23.55 km/s in the paper).  Molecular clouds; Scaling relations; Interstellar dynamics; co line emission Yaru Qi Fujun Du Xin Liu PUBLIC https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset Science Data Bank