A catalog of molecular clouds possibly associated with Galactic infrared bubbles. I. The southern Galactic plane

We have carried out a morphological search for molecular clouds possibly associated with 48 Galactic infrared bubbles with angular radii of 1 in the southern Galactic plane of 295∘ ≤ l≤ 350∘ and |b|≤ 1∘ presented by Hanaoka et al. (2019, PASJ, 71, 6). We identify 116 molecular clouds in the (l,b, VLSR ) space from the archival ¹²CO $J=1$–0 line data obtained by the Mopra Southern Galactic Plane Survey, where VLSR is the CO-line radial velocity. The kinematic distances are derived from VLSR using the most accurate rotation curve of the Milky Way. We also present measurements of velocity dispersion, size parameter, molecular mass, and virial mass of these 116 molecular clouds. This catalog is presented to investigate star formation and the origin of molecular shells/cavities possibly associated with infrared bubbles. CO line intensity maps and position–velocity diagrams of the molecular clouds are available online as supplementary data.