Optical and Gamma-Ray Variability Behaviors of 3C 454.3 from 2006 to 2011

被引：12

作者：

Fan, Xu-Liang ^{[1
]}

Li, Shao-Kun ^{[2
,3
]}

Liao, Neng-Hui ^{[4
]}

Chen, Liang ^{[5
,6
]}

Liu, Hong-Tao ^{[2
,3
]}

Lu, Kai-Xing ^{[2
,3
]}

Yan, Da-Hai ^{[2
,3
]}

Zhang, Rui-Yu ^{[5
,6
]}

Guo, Qian ^{[2
,3
,6
]}

Wu, Qingwen ^{[1
]}

Bai, Jin-Ming ^{[2
,3
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China

[2] Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China

[3] Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China

[4] Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Peoples R China

[5] Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China

[6] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

ASTROPHYSICAL JOURNAL | 2018年 / 856卷 / 01期

基金：

中国国家自然科学基金;

关键词：

galaxies: jets; quasars: individual (3C 454.3); SPACE-TELESCOPE OBSERVATIONS; XMM-NEWTON; EMISSION; JETS; RECONNECTION; BLAZARS; WEBT; CONNECTION; TURBULENCE; DECEMBER;

D O I：

10.3847/1538-4357/aab09d

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 gamma-ray data derived from the Fermi gamma-ray space telescope. The flux variation of these two bands follows a linear relation with F-gamma proportional to F-R(1.14 +/- 0.07), 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 F-gamma/F-R and the detailed structures in the light curves, and discuss some possible origins for the detailed variability behaviors.

引用

页数：8

共 52 条

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