The remnant radio galaxy associated with NGC 1534
  We present new observations of the large-scale radio emission surrounding the
lenticular galaxy NGC~1534 with the Australia Telescope Compact Array and
Murchison Widefield Array. We find no significant compact emission from the
nucleus of NGC 1534 to suggest an active core, and instead find low-power radio
emission tracing its star-formation history with a radio-derived star-formation
rate of $0.38\pm0.03$ M$_\odot$ yr$^{-1}$. The spectral energy distribution of
the extended emission is well-fit by a continuous injection model with an 'off'
component, consistent with dead radio galaxies. We find the spectral age of the
emission to be 203 Myr, having been active for 44 Myr. Polarimetric analysis
points to both a large-scale magneto-ionic Galactic foreground at $+33$ rad
m$^{-2}$ and a component associated with the northern lobe of the radio
emission at $-153$ rad m$^{-2}$. The magnetic field of the northern lobe shows
an unusual circular pattern of unknown origin. While such remnant sources are
rare, combined low- and high-frequency radio surveys with high
surface-brightness sensitivities are expected to greatly increase their numbers
in the coming decade, and combined with new optical and infrared surveys should
provide a wealth of information on the hosts of the emission.
