Radio Core-Dominance of Fermi-Blazars: Implication for Blazar
  Unification
  ...The distribution of radio core-dominance is consistent with average
projection angles of 13.5, 14.8, 16.8, 20.4, and 28.2 for ISPs, LSPs, FSRQs,
HSPs, and radio galaxies, respectively. Linear regression analyses of our data
yield significant anti-correlation r greater than 0.60 between core-dominance
parameter and extended luminosity in each individual subsample, the correlation
is significant only when individual subsamples are considered. There is a
systematic sequence of the distribution of the different subclasses on the
Core-dominance parameter-extended luminosity plane. Nevertheless, little or no
correlation between Core-dominance parameter and core luminosity or between
Core dominance parameter and gamma-ray luminosity r, less than 0.50 was
observed. There is a clear dichotomy between high synchrotron-peaking BL Lacs
and other BL Lac subclasses. The results are consistent with a unified view for
blazars and can be understood in terms of relativistic beaming persisting at
the largest scales.
