The relationship between the radio core-dominance parameter and spectral index in different classes of extragalactic radio sources (III). (arXiv:1909.06177v1 [astro-ph.GA])

The relationship between the radio core-dominance parameter and spectral index in different classes of extragalactic radio sources (III). (arXiv:1909.06177v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Pei_Z/0/1/0/all/0/1">Zhi-Yuan Pei</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fan_J/0/1/0/all/0/1">Jun-Hui Fan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bastieri_D/0/1/0/all/0/1">Denis Bastieri</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yang_J/0/1/0/all/0/1">Jiang-He Yang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Xiao_H/0/1/0/all/0/1">Hu-Bing Xiao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yang_W/0/1/0/all/0/1">W. X. Yang</a>

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 and
type II (FRI&II) radio galaxies. Following our previous work, we present a
latest sample of 966 sources with measured radio flux densities of the core and
extended components. The sample includes 83 BL Lacs, 473 FSRQs, 101 Seyferts,
245 galaxies, 52 FRIs&IIs and 12 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
corroborate that the correlation between core-dominance parameter and radio
spectral index extends over all the sources in a large sample presented.

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