Core-dominance parameter and polarization for Fermi blazars
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- 作者：Yongyun Chen (1)
Haojing Zhang (1)
Xiong Zhang (1)
Dingrong Xiong (1)
Bijun Li (1)
Xiaoling Yu (1) - 关键词：Galaxies ; active ; Galaxies ; BL Lacertae objects ; general ; Galaxies ; jets ; Galaxies ; quasars ; general
- 刊名：Astrophysics and Space Science
- 出版年：2014
- 出版时间：June 2014
- 年：2014
- 卷：351
- 期：2
- 页码：631-639
- 全文大小：
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Haojing Zhang (1)
Xiong Zhang (1)
Dingrong Xiong (1)
Bijun Li (1)
Xiaoling Yu (1)
1. Department of Physics, Yunnan Normal University, 650500, Kunming, China - ISSN：1572-946X
文摘
We study core-dominance parameter R and polarization for blazars detected by Fermi LAT. Our results are as follows. (i)?The blazars detected by Fermi LAT have higher average R and polarizations than those not detected by Fermi LAT. (ii)?Compared with BL Lacs, flat-spectrum radio quasars (FSRQs) have lower average R and the ratio of beamed luminosity to the unbeamed luminosity f. (iii)?In the diagram of polarization-Doppler factor relations, FSRQs may have p=α+3 and BL Lacs for p=α+2. These results suggest that the high optical polarization is correlated to the beaming effect. High polarization and core-dominance parameters are significantly more common among the LAT sources. The difference in polarization and core-dominance parameters between FSRQs and BL Lacs are due to the difference in their beaming effects and jet model.