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

被引：29

作者：

Pei, Zhi-Yuan ^{[1
,2
,3
,4
]}

Fan, Jun-Hui ^{[1
,2
]}

Bastieri, Denis ^{[1
,3
,4
]}

Sawangwit, Utane ^{[5
]}

Yang, Jiang-He ^{[6
]}

机构：

[1] Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China

[2] Dept Educ Guangdong Prov, Astron Sci & Technol Res Lab, Guangzhou 510006, Guangdong, Peoples R China

[3] Univ Padua, Dipartimento Fis & Astron G Galilei, I-35131 Padua, Italy

[4] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[5] NARIT, Chiang Mai 50200, Thailand

[6] Hunan Univ Arts & Sci, Dept Phys & Elect Sci, Changde 415000, Peoples R China

来源：

RESEARCH IN ASTRONOMY AND ASTROPHYSICS | 2019年 / 19卷 / 05期

基金：

中国国家自然科学基金;

关键词：

galaxies: active-galaxies; galaxies: jets-quasars: general; ACTIVE GALACTIC NUCLEI; BL LACERTAE OBJECTS; COMPLETE SAMPLE; OPTICAL MICROVARIABILITY; VLBI OBSERVATIONS; EMISSION; GALAXIES; QUASARS; BLAZARS; POLARIZATION;

D O I：

10.1088/1674-4527/19/5/70

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.), 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 FRI or FRII 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.

引用

页数：16

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