BAT AGN Spectroscopic Survey -- XV: The High Frequency Radio Cores of
  Ultra-hard X-ray Selected AGN
  We have conducted 22 GHz radio imaging at 1" resolution of 100 low-redshift
AGN selected at 14-195 keV by the Swift-BAT. We find a radio core detection
fraction of 96%, much higher than lower-frequency radio surveys. Of the 96
radio-detected AGN, 55 have compact morphologies, 30 have morphologies
consistent with nuclear star formation, and 11 have sub-kpc to kpc-scale jets.
We find that the total radio power does not distinguish between nuclear star
formation and jets as the origin of the radio emission. For 87 objects, we use
optical spectroscopy to test whether AGN physical parameters are distinct
between radio morphological types. We find that X-ray luminosities tend to be
higher if the 22 GHz morphology is jet-like, but find no significant difference
in other physical parameters. We find that the relationship between the X-ray
and core radio luminosities is consistent with the $L_R/L_X \sim 10^{-5}$ of
coronally active stars. We further find that the canonical fundamental planes
of black hole activity systematically over-predict our radio luminosities,
particularly for objects with star formation morphologies.
