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Diversity of gamma-ray and radio variability of bright blazars and implications for gamma-ray emission location
Zhang, Hai-Ming1,2; Wang, Zhen-Jie1; Zhang, Jin3; Yi, Ting-Feng4; Chen, Liang5; Lu, Rui-Jing1; Liang, En-Wei1
2020-06-01
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
ISSN0004-6264
Volume72Issue:3Pages:19
AbstractViolent multi-wavelength variabilities are observed in gamma-ray-selected blazars. We present an analysis of long-term light curves for eight bright blazars to explore the co-variation pattern in the gamma-ray and radio bands. We extract their gamma-ray light curves and spectra with data observed by the Fermi Large Area Telescope (LAT) since 2008. We find diverse co-variation patterns between the gamma-ray and radio (at 43 GHz) fluxes in these sources. The gamma-ray and radio fluxes of 3C454.3 and PKS 1633+382 are correlated without any time lag, suggesting that they are from the same radiation region. Similar correlation is also observed in 3C 273 and PKS 1222+216, but the radio flux lags behind the gamma-ray flux by approximately similar to 160d and similar to 290d, respectively. This likely suggests that their gamma-ray emission regions are located the upstream of their radio cores at 43 GHz. The gamma-ray and radio fluxes of the other four blazars are not correlated, implying that the gamma-ray and radio emission may be from different regions in their jets. The gamma-ray light curves of the eight blazars can be decomposed into some components with long-timescale variability and some fast spike flares. We propose that they may be attributed to the central engine activity and the magnetic reconnection process or turbulence in the local emission region, respectively.
Keywordgalaxies: active galaxies: jets gamma rays: galaxies radiation mechanisms: non-thermal
Funding OrganizationNASA through the Fermi Program ; NASA through the Fermi Program ; NASA through the Swift Guest Investigator Program ; NASA through the Swift Guest Investigator Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Science Foundation ; Guangxi Science Foundation ; NASA through the Fermi Program ; NASA through the Fermi Program ; NASA through the Swift Guest Investigator Program ; NASA through the Swift Guest Investigator Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Science Foundation ; Guangxi Science Foundation ; NASA through the Fermi Program ; NASA through the Fermi Program ; NASA through the Swift Guest Investigator Program ; NASA through the Swift Guest Investigator Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Science Foundation ; Guangxi Science Foundation ; NASA through the Fermi Program ; NASA through the Fermi Program ; NASA through the Swift Guest Investigator Program ; NASA through the Swift Guest Investigator Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Science Foundation ; Guangxi Science Foundation
DOI10.1093/pasj/psaa029
WOS KeywordJETS ; ABSORPTION ; RADIATION ; SHOCKS ; LIGHT
Language英语
Funding ProjectNASA through the Fermi Program ; NASA through the Swift Guest Investigator Program ; National Natural Science Foundation of China[11973050] ; National Natural Science Foundation of China[11533003] ; National Natural Science Foundation of China[11863007] ; National Natural Science Foundation of China[11851304] ; National Natural Science Foundation of China[U1938106] ; National Natural Science Foundation of China[U1731239] ; Guangxi Science Foundation[AD17129006] ; Guangxi Science Foundation[2018GXNSFDA281033] ; Guangxi Science Foundation[2018GXNSFGA281007]
Funding OrganizationNASA through the Fermi Program ; NASA through the Fermi Program ; NASA through the Swift Guest Investigator Program ; NASA through the Swift Guest Investigator Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Science Foundation ; Guangxi Science Foundation ; NASA through the Fermi Program ; NASA through the Fermi Program ; NASA through the Swift Guest Investigator Program ; NASA through the Swift Guest Investigator Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Science Foundation ; Guangxi Science Foundation ; NASA through the Fermi Program ; NASA through the Fermi Program ; NASA through the Swift Guest Investigator Program ; NASA through the Swift Guest Investigator Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Science Foundation ; Guangxi Science Foundation ; NASA through the Fermi Program ; NASA through the Fermi Program ; NASA through the Swift Guest Investigator Program ; NASA through the Swift Guest Investigator Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Science Foundation ; Guangxi Science Foundation
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000544206500009
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/82826
Collection中国科学院国家天文台
Corresponding AuthorZhang, Jin
Affiliation1.Guangxi Univ, Sch Phys Sci & Technol, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China
2.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Space Astron & Technol, Beijing 100012, Peoples R China
4.Yunnan Normal Univ, Dept Phys, Kunming 650500, Yunnan, Peoples R China
5.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Hai-Ming,Wang, Zhen-Jie,Zhang, Jin,et al. Diversity of gamma-ray and radio variability of bright blazars and implications for gamma-ray emission location[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2020,72(3):19.
APA Zhang, Hai-Ming.,Wang, Zhen-Jie.,Zhang, Jin.,Yi, Ting-Feng.,Chen, Liang.,...&Liang, En-Wei.(2020).Diversity of gamma-ray and radio variability of bright blazars and implications for gamma-ray emission location.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,72(3),19.
MLA Zhang, Hai-Ming,et al."Diversity of gamma-ray and radio variability of bright blazars and implications for gamma-ray emission location".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 72.3(2020):19.
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