Panchromatic analysis of the star formation processes in M33

The spiral galaxy M33 belongs to the local group and allows us to study star formation processes with great accuracy. The Spitzer telescope reaches spatial resolutions of the order of some parsecs and reveals the interactions between young stars and the interstellar medium. A detail analysis focussed on the typical colours of discrete sources such as HII regions, planetary nebulae and supernovae remnants. Also, we estimated the star formation rate in M33, using Halpha, UV and IR tracers. We tested the radial Kennicutt-Schmidt law, finding that the star formation shows a better correlation with the molecular gas than with the atomic or total gas content of the galaxy.