4.2. Galactic magnetic field B and star formation SF
There is a body of literature connecting the radio synchrotron emission from spiral galaxies with their Far Infrared emission, i.e., Niklas et al. (1995), Hummel et al. (1988), Dickey and Salpeter (1984). The interpretation of this narrow relation often involves star formation (e.g., dust emission in Far Infrared near newly-born stars) and cosmic rays (e.g., radio synchrotron electrons near supernovae and in the general interstellar medium).
The presence of a magnetic field is indirectly assumed, being necessary for synchrotron emission, and being capable to align dust particles emitting at Far Infrared. But is there a direct relation between star formation (SF) and magnetic field B ?