CHANG-ES VIII: Uncovering Hidden AGN Activity in Radio Polarization
  We report on C-band (5 - 7 GHz) observations of the galaxy, NGC~2992, from
the CHANG-ES sample. This galaxy displays an embedded nuclear double-lobed
radio morphology within its spiral disk, as revealed in linearly polarized
emission but {\it not} in total intensity emission. The radio lobes are
kpc-sized, similar to what has been observed in the past for other Seyfert
galaxies, and show ordered magnetic fields. NGC~2992 has shown previous
evidence for AGN-related activity, but not the linearly polarized radio
features that we present here. We draw attention to this galaxy as the first
clear example (and prototype) of bipolar radio outflow that is revealed in
linearly polarized emission only. Such polarization observations, which are
unobscured by dust, provide a new tool for uncovering hidden weak AGN activity
which may otherwise be masked by brighter unpolarized emission within which it
is embedded. The radio lobes observed in NGC~2992 are interacting with the
surrounding interstellar medium and offer new opportunities to investigate the
interactions between nuclear outflows and the ISM in nearby galaxies. We also
compare the radio emission with a new CHANDRA X-ray image of this galaxy. A new
CHANG-ES image of NGC~3079 is also briefly shown as another example as to how
much more obvious radio lobes appear in linear polarization as opposed to total
intensity.
