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| Multiband cross-correlated radio variability of the blazar 3C 279 | |
Mohana, Krishna A.1; Gupta, Alok C.1,2; Marscher, Alan P.3; Sotnikova, Yulia V.4,5; Jorstad, S. G.3,6; Wiita, Paul J.7; Cui, Lang8 ; Aller, Margo F.9; Aller, Hugh D.9; Kovalev, Yu. A.10; Kovalev, Y. Y.10,11,12; Liu, Xiang8; Mufakharov, T. V.4,5; Popkov, A. V.10,12; Mingaliev, M. G.4,5,13; Erkenov, A. K.4; Nizhelsky, N. A.4; Tsybulev, P. G.4; Zhao, Wei14,15; Weaver, Z. R.3; Morozova, D. A.6
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| 2024 | |
| Source Publication | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| ISSN | 0035-8711 |
| Volume | 527Issue:3Pages:6970-6980 |
| Contribution Rank | 8 |
| Abstract | We present the results of our study of cross-correlations between long-term multiband observations of the radio variability of the blazar 3C 279. More than a decade (2008-2022) of radio data were collected at seven different frequencies ranging from 2 to 230 GHz. The multiband radio light curves show variations in flux, with the prominent flare features appearing first at higher-frequency and later in lower-frequency bands. This behaviour is quantified by cross-correlation analysis, which finds that the emission at lower-frequency bands lags that at higher-frequency bands. Lag versus frequency plots are well fit by straight lines with negative slope, typically similar to-30 day GHz(-1). We discuss these flux variations in conjunction with the evolution of bright moving knots seen in multiepoch Very Long Baseline Array maps to suggest possible physical changes in the jet that can explain the observational results. Some of the variations are consistent with the predictions of shock models, while others are better explained by a changing Doppler beaming factor as the knot trajectory bends slightly, given a small viewing angle to the jet. |
| Keyword | radiation mechanisms: non-thermal galaxies: active galaxies: jets quasars: individual: 3C 279 |
| DOI | 10.1093/mnras/stad3583 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | FLUX-DENSITY SCALE ; BL LACERTAE OBJECTS ; GAMMA-RAY BLAZARS ; INTRADAY VARIABILITY ; BAND VARIABILITY ; RELATIVISTIC JET ; FLARING ACTIVITY ; FERMI BLAZARS ; LIGHT CURVES ; 43 GHZ |
| Funding Project | Ministry of Science and Higher Education of the Russian Federation[2016VMB073] ; NSF[AST-0607523] ; NASA ; University of Michigan - NASA through the Fermi Guest Investigator Program[NNX09AU16G] ; University of Michigan - NASA through the Fermi Guest Investigator Program[NNX10AP16G] ; University of Michigan - NASA through the Fermi Guest Investigator Program[NNX11AO13G] ; University of Michigan - NASA through the Fermi Guest Investigator Program[NNX13AP18G] ; Urumqi Nanshan Astronomy and Deep Space Exploration Observation and Research Station of Xinjiang[XJYWZ2303] ; Smithsonian Institution ; Academia Sinica ; ARIES Regular Post-Doctoral Fellowship[AO/RA/2022/1960] ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Xinjiang Regional Collaborative Innovation Project[075-15-2020-778] ; National Science Foundation of China[2022E01013] ; Chinese Academy of Sciences (CAS) 'Light of West China' Program[12173078] ; Chinese Academy of Sciences (CAS) 'Light of West China' Program[11773062] ; National Key R&D Intergovernmental Cooperation Program of China[2021-XBQNXZ-005] ; European Research Council (ERC) under the European Union[2023YFE0102300] ; [101018682] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001131511000063 |
| Publisher | OXFORD UNIV PRESS |
| Funding Organization | Ministry of Science and Higher Education of the Russian Federation ; NSF ; NASA ; University of Michigan - NASA through the Fermi Guest Investigator Program ; Urumqi Nanshan Astronomy and Deep Space Exploration Observation and Research Station of Xinjiang ; Smithsonian Institution ; Academia Sinica ; ARIES Regular Post-Doctoral Fellowship ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Xinjiang Regional Collaborative Innovation Project ; National Science Foundation of China ; Chinese Academy of Sciences (CAS) 'Light of West China' Program ; National Key R&D Intergovernmental Cooperation Program of China ; European Research Council (ERC) under the European Union |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/5810 |
| Collection | 射电天文研究室_星系宇宙学研究团组 科研仪器设备产出_利用南山26米射电望远镜（NSRT）观测数据的文章 |
| Corresponding Author | Mohana, Krishna A.; Gupta, Alok C.; Marscher, Alan P. |
| Affiliation | 1.Aryabhatta Res Inst Observ Sci ARIES, Manora Peak, Naini Tal 263001, India 2.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Boston Univ, Inst Astrophys Res, 725 Commonwealth Ave, Boston, MA 02215 USA 4.RAS, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia 5.Kazan Fed Univ, 18 Kremlyovskaya St, Kazan 420008, Russia 6.St Petersburg State Univ, 7 9 Univ skaya nab, St Petersburg 199034, Russia 7.Coll New Jersey, Dept Phys, 2000 Pennington Rd, Ewing, NJ 08628 USA 8.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China 9.Univ Michigan, Dept Astron, 1085 S Univ Ave, Ann Arbor, MI 48109 USA 10.Russian Acad Sci, Lebedev Phys Inst, Ctr Astro Space, Moscow 117991, Russia 11.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 12.Moscow Inst Phys & Technol, Inst sky per 9, Dolgoprudnyi 141700, Russia 13.Russian Acad Sci, Inst Appl Astron, St Petersburg 191187, Russia 14.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 15.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China |
| Recommended Citation GB/T 7714 | Mohana, Krishna A.,Gupta, Alok C.,Marscher, Alan P.,et al. Multiband cross-correlated radio variability of the blazar 3C 279[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2024,527(3):6970-6980. |
| APA | Mohana, Krishna A..,Gupta, Alok C..,Marscher, Alan P..,Sotnikova, Yulia V..,Jorstad, S. G..,...&Morozova, D. A..(2024).Multiband cross-correlated radio variability of the blazar 3C 279.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,527(3),6970-6980. |
| MLA | Mohana, Krishna A.,et al."Multiband cross-correlated radio variability of the blazar 3C 279".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 527.3(2024):6970-6980. |
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| Mohana-2024-Multiban（2222KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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