The Quasar Feedback Survey: Discovering hidden Radio-AGN and their
  connection to the host galaxy ionised gas
  We present the first results from the Quasar Feedback Survey, a sample of 42
z<0.2, [O III] luminous AGN (L[O III]>10^42.1 ergs/s) with moderate radio
luminosities (i.e. L(1.4GHz)>10^23.4 W/Hz; median L(1.4GHz)=5.9x10^23 W/Hz).
Using high spatial resolution (~0.3-1 arcsec), 1.5-6 GHz radio images from the
Very Large Array, we find that 67 percent of the sample have spatially extended
radio features, on ~1-60 kpc scales. The radio sizes and morphologies suggest
that these may be lower radio luminosity versions of compact, radio-loud AGN.
By combining the radio-to-infrared excess parameter, spectral index, radio
morphology and brightness temperature, we find radio emission in at least 57
percent of the sample that is associated with AGN-related processes (e.g. jets,
quasar-driven winds or coronal emission). This is despite only 9.5-21 percent
being classified as radio-loud using traditional criteria. The origin of the
radio emission in the remainder of the sample is unclear. We find that both the
established anti-correlation between radio size and the width of the [O III]
line, and the known trend for the most [O III] luminous AGN to be associated
with spatially-extended radio emission, also hold for our sample of moderate
radio luminosity quasars. These observations add to the growing evidence of a
connection between the radio emission and ionised gas in quasar host galaxies.
This work lays the foundation for deeper investigations into the drivers and
impact of feedback in this unique sample.
