Stars, gas, and dust at high resolution in the triangulum galaxy

This thesis investigates the interplay between dust, gas, and stars at high resolution in nearby Local Group galaxy M33. Using panchromatic spectral energy distribution (SED) fitting along with ancillary gas tracer data, the star formation law is studied at scales of 100pc. A strong scale dependence is seen in the fitted power law index no matter which gas tracer is used, and whilst correlations between each tracer of gas and SFR remain strong, the correlation between SFR and molecular gas is strongest, perhaps indicating that the molecular gas is the more important driver of star formation. A catalogue of Giant Molecular Clouds (GMCs) is extracted from sub-millimetre wavelength data. These clouds have a much lower gas-to-dust ratio (GDR) than found in the Milky Way. The mass function of these clouds follows a slope proportional to