A study of the Physical Properties and Star Formation Activity of a Large Sample of Molecular Clouds: I Distances.

This repository contains the distance catalog for 1,573 molecular clouds identified from the MWISP Phase I CO survey (l = 9.75°–229.25°, |b| < 5.25°). The catalog is restricted to clouds within a heliocentric distance of 3 kpc. The distances are derived using three independent methods that match CO line intensity maps with 3D dust extinction maps from Gaia, Pan-STARRS 1, and 2MASS.Repository Contents:1. CloudCatalog_ScienceDB.txt  Machine-readable table containing distances and physical properties of 1,573 molecular clouds.  Column Description:  --------------------------------------------------------------------------------  Bytes  Format  Units  Label     Explanations  --------------------------------------------------------------------------------  1-4   I4    ---   Seq      Sequence number in this table  6-10   I5    ---   cloudIndex   The catalog index from Yang et al. (2025)  12-36  A25    ---   cloudName   The molecular cloud name including average l-b-V coordinates  38-44  F7.4   deg²   Area      Angular area, square degrees  46-51  F6.2   pc    r       Cloud radius, parsecs  53-60  F8.0   pc    D_KStest    Distance from the statistical method  62-66  F5.0   pc    e_D_KStest   Uncertainty in D_KStest  68-75  F8.0   pc    D_Kmeans    Distance from morphological matching  77-81  F5.0   pc    e_D_Kmeans   Uncertainty in D_Kmeans  83-90  F8.0   pc    D_Correlation Distance from dust map correlation  92-96  F5.0   pc    D_Correlation_l Lower uncertainty in D_Correlation  98-103  F6.0   pc    D_Correlation_h Upper uncertainty in D_Correlation  105-112 E8.2   10³ M⊙  Mass      Cloud mass in 10³ solar masses  114-119 F6.3   kpc   D_Reid2014   Kinematic distance from Reid et al. (2014) model  121-126 F6.3   kpc   D_Reid2014_l  Lower uncertainty for D_Reid2014  128-133 F6.3   kpc   D_Reid2014_h  Upper uncertainty for D_Reid2014  135-140 F6.3   kpc   D_Reid2019   Kinematic distance from Reid et al. (2019) model  142-147 F6.3   kpc   e_D_Reid2019  Uncertainty in D_Reid2019  149-154 A6    ---   Notes     Additional notes and flags  --------------------------------------------------------------------------------2. Figure_CloudDistancesResults_ThreeMethods.zip  Diagnostic figures for each cloud showing the results of the three distance estimation methods.