Uncovering star formation feedback and magnetism in galaxies with radio
  continuum surveys
  Recent studies show the importance of the star formation feedback in changing
the energetic and structure of galaxies. Dissecting the physics of the feedback
is hence crucial to understand the evolution of galaxies. Full polarization
radio continuum surveys can be ideally performed to trace not only star
formation but also the energetic components of the interstellar medium (ISM),
the magnetic fields and cosmic ray electrons. Using the SKA precursors, we
investigate the effect of the massive star formation on the ISM energy balance
in nearby galaxies. Our multi-scale and multi-frequency surveys show that
cosmic rays are injected in star forming regions and lose energy propagating
away from their birth place. Due to the star formation feedback, cosmic ray
electron population becomes younger and more energetic. Star formation also
amplifies the turbulent magnetic field inserting a high pressure which is
important in energy balance in the ISM and structure formation in the host
galaxy.
