NAOC Open IR
On the origin of GeV spectral break for Fermi blazars: 3C 454.3
Kang, Shi-Ju1,2; Zheng, Yong-Gang2; Wu, Qingwen3; Chen, Liang4; Yin, Yue1
2021-04-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume502Issue:4Pages:5875-5881
AbstractThe GeV break in spectra of the blazar 3C 454.3 is a special observation feature that has been discovered by the Fermi-LAT. The origin of the GeV break in the spectra is still under debate. In order to explore the possible source of GeV spectral break in 3C 454.3, a one-zone homogeneous leptonic jet model and the McFit technique are utilized for fitting the quasi-simultaneous multiwaveband spectral energy distribution (SED) of 3C 454.3. The outside border of the broad-line region (BLR) and inner dust torus are chosen to contribute radiation in the model as external, seed photons to the external-Compton process, considering the observed gamma-ray radiation. The combination of two components, namely the Compton-scattered BLR and dust torus radiation, assuming a broken power-law distribution of emitted particles, provides a proper fitting to the multiwaveband SED of 3C 454.3 detected 2008 August 3-September 2 and explains the GeV spectral break. We propose that the spectral break of 3C 454.3 may originate from an inherent break in the energy distribution of the emitted particles and the Klein-Nishina effect. A comparison is performed between the energy density of the 'external' photon field for the whole BLR U-BLR achieved via model fitting and that constrained from the BLR data. The distance from the position of the gamma-ray radiation area of 3C 454.3 to the central black hole could be constrained at similar to 0.78 pc (similar to 4.00R(BLR), the size of the BLR).
Keywordgalaxies: active galaxies: individual: 3C 454.3 gamma-rays: galaxies
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province
DOI10.1093/mnras/stab489
Language英语
Funding ProjectNational Natural Science Foundation of China[11763005] ; National Natural Science Foundation of China[11873043] ; National Natural Science Foundation of China[U1931203] ; National Natural Science Foundation of China[U1831138] ; Science and Technology Foundation of Guizhou Province[QKHJC[2019]1290] ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province[QJHKYZ[2018]068]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province ; Research Foundation for Scientific Elitists of the Department of Education of Guizhou Province
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000637320100085
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/78268
Collection中国科学院国家天文台
Corresponding AuthorKang, Shi-Ju; Zheng, Yong-Gang; Wu, Qingwen
Affiliation1.Liupanshui Normal Univ, Sch Phys & Elect Engn, Liupanshui 553004, Guizhou, Peoples R China
2.Yunnan Normal Univ, Dept Phys, Kunming 650092, Yunnan, Peoples R China
3.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China
4.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
Recommended Citation
GB/T 7714
Kang, Shi-Ju,Zheng, Yong-Gang,Wu, Qingwen,et al. On the origin of GeV spectral break for Fermi blazars: 3C 454.3[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,502(4):5875-5881.
APA Kang, Shi-Ju,Zheng, Yong-Gang,Wu, Qingwen,Chen, Liang,&Yin, Yue.(2021).On the origin of GeV spectral break for Fermi blazars: 3C 454.3.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,502(4),5875-5881.
MLA Kang, Shi-Ju,et al."On the origin of GeV spectral break for Fermi blazars: 3C 454.3".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 502.4(2021):5875-5881.
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