Two striking head-tail galaxies in the galaxy cluster IIZW108: insights
  into transition to turbulence, magnetic fields and particle re-acceleration
  We present deep JVLA observations at 1.4 GHz and 2.7 GHz (full polarization),
as well as optical OmegaWINGS/WINGS and X-ray observations of two extended
radio galaxies in the IIZW108 galaxy cluster at z = 0.04889. They show a bent
tail morphology in agreement with a radio lobed galaxy falling into the cluster
potential. Both galaxies are found to possess properties comparable with
{narrow-angle} tail galaxies in the literature even though they are part of a
low mass cluster. We find a spectral index steepening and an increase in
fractional polarization through the galaxy jets and an ordered magnetic field
component mostly aligned with the jet direction. This is likely caused by
either shear due to the velocity difference of the intracluster medium and the
jet fluid and/or magnetic draping of the intracluster medium across the galaxy
jets. We find clear evidence that one source is showing two active galactic
nuclei (AGN) outbursts from which we expect the AGN has never turned off
completely. We show that pure standard electron cooling cannot explain the jet
length. We demonstrate therefore that these galaxies can be used as a
laboratory to study gentle re-acceleration of relativistic electrons in galaxy
jets via transition from laminar to turbulent motion.
