Far-infrared - radio correlation and magnetic field strength in
  star-forming early-type galaxies
  A tight far-infrared - radio correlation similar to that in star-forming
late-type galaxies is also indicated in star-forming blue early-type galaxies,
in which the nuclear optical-line emissions are primarily due to star-forming
activities without a significant contribution from active galactic nuclei. The
average value of far-infrared to 1.4 GHz radio flux-ratio commonly represented
as the $'q'$ parameter is estimated to be $2.35\pm0.05$ with a scatter of 0.16
dex. The average star formation rate estimated using 1.4 GHz radio continuum is
$\sim6$ M$_{\odot}$ yr$^{-1}$ in good agreement with those estimated using
far-infrared and H$\alpha$ luminosities. The radio emission is detected mainly
from central region which could be associated with the star-forming activities,
most likely triggered by recent tidal interactions. The average thermal
contribution to total radio flux is estimated to be $\sim12$ per cent. The
average value of the magnetic field strengths in the star-forming early-type
galaxies is estimated to be 12$^{+11}_{-4}$ $\mu$G. These magnetic fields are
very likely generated via fast amplification in small-scale turbulent dynamos
acting in the star-bursting regions.
