Determining the ratio of the jet to the unbeamed luminosities for γ-ray blazars

被引：0
作者：
Pei, Zhiyuan [1 ,2 ,3 ,4 ]
Li, Ziyan [1 ]
Huang, Xiulin [1 ]
Qian, Yanjun [1 ]
Huang, Danyi [1 ]
Li, Chengfeng [1 ]
Liao, Jiru [1 ]
Ye, Xiao [1 ]
Liang, Jingchao [1 ,2 ,3 ,4 ]
Chen, Guohai [1 ,2 ,3 ,4 ]
Fan, Junhui [1 ,2 ,3 ,4 ]
机构：
[1] Guangzhou Univ, Sch Phys & Mat Sci, Guangzhou 510006, Peoples R China
[2] Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Peoples R China
[3] Astron Sci & Technol Res Lab, Dept Educ Guangdong Prov, Guangzhou 510006, Peoples R China
[4] Key Lab Astron Observat & Technol Guangzhou, Guangzhou 510006, Peoples R China
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2023年 / 525卷 / 04期
基金：
美国国家科学基金会; 中国国家自然科学基金; 中国博士后科学基金;
关键词：
galaxies: active; (galaxies:) BL Lacertae objects: general; (galaxies:) quasars: general; gamma-rays: general; RADIO CORE-DOMINANCE; ACTIVE GALACTIC NUCLEI; SPECTRAL ENERGY-DISTRIBUTIONS; BL LACERTAE OBJECTS; X-RAY; FERMI-LAT; POLARIZATION PROPERTIES; RELATIVISTIC JETS; DOPPLER FACTORS; 4TH CATALOG;
D O I：
10.1093/mnras/stad2730
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The spectacular observational phenomena lying in blazars can be well explained and described by the relativistic beaming effect that the emission in the jet is highly boosted along the line of sight to observers. Aiming to reveal the intrinsic emission core dominance in gamma-ray loud blazars, we collect a large sample including 226 blazars with available superluminal motion data and radio core-dominance parameters at 5 GHz, and calculate a crucial parameter, R-perpendicular to, defined as the ratio of the luminosity in the jet to the unbeamed luminosity when the viewing angle comes up to 90 degrees. R-perpendicular to is a better parameter than the well-known core-dominance parameter, R, to reveal more intrinsic physical properties behind the prominent observational characteristics within blazars. We primarily ascertain the updated median value of R-? = 0.032 at 5 GHz, illustrating around 97 per cent of the total radio emission are dominated by the jets in gamma-ray loud blazars. We also make further discussion on the physical difference in BL Lacertae objects and flat-spectrum radio quasars.
引用
收藏
页码：6214 / 6222
页数：9
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