The environment of radio sources in the VLA-COSMOS Survey field
  This work studies the correlation among environmental density and radio AGN
presence up to $z = 2$. Using data from the photometric COSMOS survey and its
radio 1.4 GHz follow-up (VLA-COSMOS), a sample of radio AGNs has been defined.
The environment was studied using the richness distributions inside a
parallelepiped with base side of 1 Mpc and height proportional to the
photometric redshift precision. Radio AGNs are found to be always located in
environments significantly richer than those around galaxies with no radio
emission. Moreover, a distinction based on radio AGN power shows that the
significance of the environmental effect is only maintained for low-power radio
sources. The results of this work show that denser environments play a
significant role in enhancing the probability that a galaxy hosts a radio AGN
and, in particular, low-power ones.
