Submillimetre observations of WISE/radio-selected AGN and their
  environments
  We present JCMT SCUBA-2 850microns submillimetre (submm) observations of 30
mid-infrared (mid-IR) luminous AGN, detected jointly by the WISE all-sky IR
survey and the NVSS/FIRST radio survey. These rare sources are selected by
their extremely red mid-infrared spectral energy distributions (SEDs) and
compact radio counterparts. Further investigations show that they are highly
obscured, have abundant warm AGN-heated dust and are thought to be experiencing
intense AGN feedback. These galaxies appear to be consistent with an
AGN-dominated galaxy, and could be a transient phase of merging galaxies. When
comparing the number of submm galaxies (SMGs) detected serendipitously in the
surrounding 1.5-arcmin to those in blank-field submm surveys, there is a very
significant overdensity, of order 5, but no sign of radial clustering centred
at our primary objects. The WISE/radio-selected AGN thus reside in 10-Mpc-scale
overdense environments, that could be forming in pre-viralised clusters of
galaxies. WISE/radio-selected AGNs appear to be the strongest signposts of
high-density regions of active, luminous and dusty galaxies. SCUBA-2 850microns
observations indicate that their submm fluxes are low compared to many popular
AGN SED templates, hence the WISE/radio-selected AGNs have either less cold
and/or more warm dust emission than normally assumed for typical AGN. Most of
the targets are not detected, only four targets are detected at SCUBA-2
850microns, and have total IR luminosities >= 10^13 L_solar, if their redshifts
are consistent with the subset of the 10 SCUBA-2 undetected targets with known
redshifts, z ~ 0.44 - 2.86.
