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The flat-spectrum radio quasar 3C 345 from the high to the low emission state
Berton, M.1,2; Liao, N.H.3; La Mura, G.1; La Mura, G.4,5; Congiu, E.1,2; Foschini, L.2; Frezzato, M.1; Ramakrishnan, V.6; Fan XL(范绪亮)7,8; Lähteenmäki, A.4,5; Pursimo, T.8; Abate, V.1; Bai JM(白金明)7; Calcidese, P.9; Ciroi, S.1; Chen, L.10; Cracco, V.1; Li SK(李少昆)7; Tornikoski, M.4; Rafanelli, P.1
发表期刊ASTRONOMY & ASTROPHYSICS
2018-06-01
卷号614
DOI10.1051/0004-6361/201731625
产权排序第7完成单位
收录类别SCI ; EI
关键词Galaxies: Jets Quasars: Emission Lines Quasars: Supermassive Black Holes Quasars: Individual: 3c 345
摘要

We report simultaneous observations at different energy bands in radio, optical, UV, X-rays and γ rays of the flat-spectrum radio-quasar 3C 345. We built the light curve of the source at different frequencies from 2008, the beginning of the Fermi all-sky survey, to 2016, using new data and public archives. In particular we obtained several optical spectra, to study the behavior of emission lines and the continuum in different activity states and to derive the black hole mass. 3C 345 showed two flaring episodes in 2009, which occurred simultaneously in γ ray, optical/UV and X-rays, and were later followed in radio. The source shows an inverse Compton dominated spectral energy distribution, which moved from higher to lower frequencies from the high to the low state. The reverberation of emission lines during one outburst event allowed us to constrain the location of production of γ rays very close to the broad-line region, and possibly in the jet-base. We report the observation of an increased accretion after the outburst, possibly induced by the decrease of magnetic field intensity with respect to the low state.

资助项目National Natural Science Foundation of China[11703093] ; Fondazione CRT ; PRIN INAF 2014 ; Regional Government of the Aosta Valley ; Town Municipality of Nus ; Unite des Communes valdotaines Mont-Emilius ; CAS ; People's Government of Yunnan Province ; National Aeronautics and Space Administration[NNG05GF22G] ; U.S. National Science Foundation[AST-0909182] ; U.S. National Science Foundation[AST-1313422] ; Fermi Guest Investigator grants[NNX08AW56G] ; Fermi Guest Investigator grants[NNX09AU10G] ; Fermi Guest Investigator grants[NNX12AO93G] ; Fermi Guest Investigator grants[NNX15AU81G] ; NASA[NNX08AW31G] ; NASA[NNX11A043G] ; NSF[AST-0808050] ; NSF[AST-1109911] ; Alfred P. Sloan Foundation ; U.S. Department of Energy Office of Science ; Istituto Nazionale di Astrofisica in Italy ; Centre National d'Etudes Spatiales in France ; DOE[DE-AC02-76SF00515]
项目资助者National Natural Science Foundation of China[11703093] ; Fondazione CRT ; PRIN INAF 2014 ; Regional Government of the Aosta Valley ; Town Municipality of Nus ; Unite des Communes valdotaines Mont-Emilius ; CAS ; People's Government of Yunnan Province ; National Aeronautics and Space Administration[NNG05GF22G] ; U.S. National Science Foundation[AST-0909182, AST-1313422] ; Fermi Guest Investigator grants[NNX08AW56G, NNX09AU10G, NNX12AO93G, NNX15AU81G] ; NASA[NNX08AW31G, NNX11A043G] ; NSF[AST-0808050, AST-1109911] ; Alfred P. Sloan Foundation ; U.S. Department of Energy Office of Science ; Istituto Nazionale di Astrofisica in Italy ; Centre National d'Etudes Spatiales in France ; DOE[DE-AC02-76SF00515]
语种英语
学科领域天文学 ; 天体物理学 ; 高能天体物理学
学科门类理学 ; 理学::天文学
文章类型Article
出版者EDP SCIENCES S A
出版地17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
ISSN1432-0746
URL查看原文
WOS记录号WOS:000436906500002
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]Active Galactic Nuclei ; Large-area Telescope ; Gamma-ray Variability ; Parsec-scale Jet ; Relativistic Jets ; Fermi Blazars ; Black-hole ; Region ; Galaxies ; 3c-345
EI入藏号20182705520555
EI主题词Gamma Rays
EI分类号652.1.2military Aircraft - 657.2extraterrestrial Physics And Stellar Phenomena - 711electromagnetic Waves - 931.5gravitation, Relativity And String Theory - 932.1high Energy Physics
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/12386
专题丽江天文观测站(南方基地)
通讯作者Berton, M.
作者单位1.Dipartimento di Fisica e Astronomia 'G. Galilei', Università di Padova, Vicolo dell'Osservatorio 3, Padova, 35122, Italy
2.INAF, Osservatorio Astronomico di Brera, via E. Bianchi 46, Merate (LC), 23807, Italy
3.Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, 210008, China
4.Aalto University Metsähovi Radio Observatory, Metsähovintie 114, Kylmälä, 02540, Finland
5.Aalto University Department of Radio Science and Engineering, Aalto, 00076, Finland
6.Universidad de Concepción, Departamento de Astronomía, Casilla 160-C, Concepción, Chile
7.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan, 650011, China
8.School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China
9.Nordic Optical Telescope, Apartado 474, Santa Cruz de La Palma, 38700, Spain
10.Osservatorio Astronomico della Regione Autonoma Valle d'Aosta, Saint Barthelemy, Nus, 11020, Italy
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Berton, M.,Liao, N.H.,La Mura, G.,et al. The flat-spectrum radio quasar 3C 345 from the high to the low emission state[J]. ASTRONOMY & ASTROPHYSICS,2018,614.
APA Berton, M..,Liao, N.H..,La Mura, G..,La Mura, G..,Congiu, E..,...&Rafanelli, P..(2018).The flat-spectrum radio quasar 3C 345 from the high to the low emission state.ASTRONOMY & ASTROPHYSICS,614.
MLA Berton, M.,et al."The flat-spectrum radio quasar 3C 345 from the high to the low emission state".ASTRONOMY & ASTROPHYSICS 614(2018).
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