The relation between galaxy density and radio jet power for 1.4 GHz VLA
  selected AGN in Stripe 82
  Using a Karl G. Jansky Very Large Array (VLA) L-band (1-2 GHz) survey
covering $\sim100$\,deg$^2$ of the Stripe 82 field, we have obtained a
catalogue of 2716 radio AGN. For these AGN, we investigate the impact of galaxy
density on 1.4 GHz radio luminosity ($L_{1.4}$). We determine their close
environment densities using the surface density parameter, $\Sigma_N,$ for
$N=2$ and $N=5,$ which we bin by redshift to obtain a pseudo-3D galaxy density
measure. Matching the radio AGN to sources without radio detections in terms of
redshift, $K-$band magnitude and ($g-K$)-colour index, we obtain samples of
control galaxies and determine whether radio AGN environments differ from this
general population. Our results indicate that the environmental density of
radio AGN and their radio luminosity are not correlated up to $z$ $\sim0.8$,
over the luminosity range $10^{23} < (L_{1.4} / $W~Hz$^{-1}) < 10^{26}$. We
also find that, when using a control sample matched in terms of redshift,
$K-$band magnitude and colour, environments of radio AGN are similar to those
of the control sample but with an excess of overdense regions in which radio
AGN are more prevalent. Our results suggest that the $<1$ Mpc-scale galaxy
environment plays some role in determining whether a galaxy produces a radio
AGN. The jet power, however, does not correlate with environment. From this, we
infer that secular processes e.g. accretion flows of cold gas to the central
black-hole are more critical in fuelling radio AGN activity than radio jet
power.
