The relationship between the radio core-dominance parameter and spectral
  index in different classes of extragalactic radio sources (II)
  Active galactic nuclei (AGNs) can be divided into two major classes, namely
radio loud and radio quiet AGNs. A small subset of the radio-loud AGNs is
called blazars, which are believed to be unified with Fanaroff & Riley type
I/II (FRI/II) radio galaxies. Following our previous work (Fan et al. 2011), we
present a sample of 2400 sources with measured radio flux densities of the core
and extended components. The sample contains 250 BL Lacs, 520 quasars, 175
Seyferts, 1178 galaxies, 153 Fanaroff & Riley type I and type II galaxies and
104 unidentified sources. We then calculate the radio core-dominance parameters
and spectral indices and study their relationship. Our analysis shows that the
core-dominance parameters and spectral indices are quite different for
different types of sources. We also confirm that the correlation between
core-dominance parameter and spectral index exists for a large sample presented
in this work.
