Presentation #113.04D in the session “Galaxy Morphology and Star Formation”.
In the hierarchical view of star formation, giant molecular gas clouds (GMCs) undergo fragmentation to form small-scale structures made up of stars and star clusters which constitute larger structures within galaxies. Here we study the connection between young stars and cold gas across a range of galactic environments by combining the PHANGS-ALMA catalog of GMCs with the preliminary star cluster catalogs from PHANGS-HST. High-resolution (1") ALMA CO(2-1) observations of a sample of >70 nearby galaxies provide the basis of the GMC catalogs produced by PHANGS-ALMA while the PHANGS-HST star cluster catalogs are produced from HST UV-optical imaging of a subsample of the galaxies. We spatially correlate the star clusters and GMCs and, using the star cluster ages provided PHANGS-HST, statistically derive the timescales of star formation within GMCs. We apply this technique across a sample of galaxies and range of galactic environments (i.e., bulges, bars, spiral arms, etc.) thus providing insight on the connection between star formation at small-scales and large-scale galactic structure.