The relationship between the radio core-dominance parameter and spectral index in different classes of extragalactic radio sources (II)

Autor:	Pei, Zhi-Yuan, Fan, Jun-Hui, Bastieri, Denis, Sawangwit, Utane, Yang, Jiang-He
Rok vydání:	2018
Předmět:	Astrophysics - Astrophysics of Galaxies Astrophysics - High Energy Astrophysical Phenomena
Druh dokumentu:	Working Paper
DOI:	10.1088/1674-4527/19/5/70
Popis:	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. Comment: 24 pages, 10 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1811.08774 Zobrazit plný text záznamu View this record from Arxiv