Optical and Gamma-Ray Variability Behaviors of 3C 454.3 from 2006 to 2011
Fan,Xu-Liang1; Li,Shao-Kun2,3; Liao,Neng-Hui4; Chen,Liang5,6; Liu,Hong-Tao2,3; Lu,Kai-Xing2,3; Yan,Da-Hai2,3; Zhang,Rui-Yu5,6; Guo,Qian2,3,6; Wu,Qingwen1; Bai,Jin-Ming2,3
Source PublicationThe Astrophysical Journal
AbstractAbstract We present our photometric monitoring of a flat spectrum radio quasar 3C 454.3 at Yunnan observatories from 2006 to 2011. We find that the optical color of 3C 454.3 shows an obvious redder-when-brighter trend, which reaches a saturation stage when the source is brighter than 15.15 mag at V band. We perform a simulation with multiple values of disk luminosity and spectral index to reproduce the magnitude–color diagram. The results show that the contamination caused by the disk radiation alone is difficult to produce the observed color variability. The variability properties during the outburst in 2009 December are also compared with γ-ray data derived from the Fermi γ-ray space telescope. The flux variation of these two bands follows a linear relation with , which provides observational evidence for the external Compton process in 3C 454.3. Meanwhile, this flux correlation indicates that electron injection is the main mechanism for the variability origin. We also explore the variation of the flux ratio Fγ/FR and the detailed structures in the light curves, and discuss some possible origins for the detailed variability behaviors.
Keywordgalaxies: jets quasars: individual (3C 454.3)
WOS IDIOP:0004-637X-856-1-aab09d
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China;,
2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China;
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China
4.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, People’s Republic of China
5.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People’s Republic of China
6.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
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Fan,Xu-Liang,Li,Shao-Kun,Liao,Neng-Hui,et al. Optical and Gamma-Ray Variability Behaviors of 3C 454.3 from 2006 to 2011[J]. The Astrophysical Journal,2018,856(1).
APA Fan,Xu-Liang.,Li,Shao-Kun.,Liao,Neng-Hui.,Chen,Liang.,Liu,Hong-Tao.,...&Bai,Jin-Ming.(2018).Optical and Gamma-Ray Variability Behaviors of 3C 454.3 from 2006 to 2011.The Astrophysical Journal,856(1).
MLA Fan,Xu-Liang,et al."Optical and Gamma-Ray Variability Behaviors of 3C 454.3 from 2006 to 2011".The Astrophysical Journal 856.1(2018).
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