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The core dominance parameter for gamma-ray loud blazars

Published online by Cambridge University Press:  24 March 2015

Z. Y. Pei ,
J. H. Fan ,
Y. Liu ,
H. J. Xie ,
Y. Gao  and
C. Lin
Z. Y. Pei
Affiliation:
Center for Astrophysics, Guangzhou University, Guangzhou 510006, China Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province, Guangzhou 510006, China
J. H. Fan
Affiliation:
Center for Astrophysics, Guangzhou University, Guangzhou 510006, China Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province, Guangzhou 510006, China
Y. Liu
Affiliation:
Center for Astrophysics, Guangzhou University, Guangzhou 510006, China Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province, Guangzhou 510006, China
H. J. Xie
Affiliation:
Dept. of Phys. School for Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006, China
Y. Gao
Affiliation:
Dept. of Phys. School for Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006, China
C. Lin
Affiliation:
Dept. of Phys. School for Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006, China
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Abstract

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In this work, we compiled 604 blazars with available core-dominance parameter, out of which 149 blazars are known to have γ-ray emissions. We compared the logR between the 149 Fermi-detected blazars (FDB) and the rest non-Fermi-detected blazars (non-FDB), and found that the average values are < logR > = 1.12 ± 0.88 for FDBs and < logR > = 0.05 ± 0.94 for non-FDBs. A K-S test shows that the probability for the distributions of FDB and non-FDB to come from the same parent distribution is P = 2.38 × 10−7. We also investigated the correlation between the core-dominance parameters and the γ-ray emission variability index (VI) for 125 FDBs (45 BLs and 79 FSRQs), and found that there is a tendency for VI to increase with the core-dominance parameter for 79 FSRQs, but there is no such tendency for 46 BLs.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S313: Extragalactic jets from every angle , September 2014 , pp. 83 - 84
Copyright
Copyright © International Astronomical Union 2015 

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