中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 新疆天文台
  3. 研究单元未命名
  4. 射电天文研究室
  5. 星系宇宙学研究团组
Multiband cross-correlated radio variability of the blazar 3C 279

文献类型：期刊论文

作者Mohana, Krishna A.2; Gupta, Alok C.2,3; Marscher, Alan P.4; Sotnikova, Yulia V.5,6; Jorstad, S. G.4,7; Wiita, Paul J.8; Cui, Lang9; Aller, Margo F.10; Aller, Hugh D.10; Kovalev, Yu. A.11
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2024
卷号527期号:3页码:6970-6980
关键词radiation mechanisms: non-thermal galaxies: active galaxies: jets quasars: individual: 3C 279
ISSN号0035-8711
DOI10.1093/mnras/stad3583
产权排序8
英文摘要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.
WOS关键词FLUX-DENSITY SCALE ; BL LACERTAE OBJECTS ; GAMMA-RAY BLAZARS ; INTRADAY VARIABILITY ; BAND VARIABILITY ; RELATIVISTIC JET ; FLARING ACTIVITY ; FERMI BLAZARS ; LIGHT CURVES ; 43 GHZ
资助项目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研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001131511000063
出版者OXFORD UNIV PRESS
资助机构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
源URL[http://ir.xao.ac.cn/handle/45760611-7/5809]  
专题星系宇宙学研究团组
射电天文研究室_利用南山26米射电望远镜观测数据的文章
通讯作者Mohana, Krishna A.; Gupta, Alok C.; Marscher, Alan P.
作者单位1.Russian Acad Sci, Inst Appl Astron, St Petersburg 191187, Russia
2.Aryabhatta Res Inst Observ Sci ARIES, Manora Peak, Naini Tal 263001, India
3.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, Shanghai 200030, Peoples R China
4.Boston Univ, Inst Astrophys Res, 725 Commonwealth Ave, Boston, MA 02215 USA
5.RAS, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia
6.Kazan Fed Univ, 18 Kremlyovskaya St, Kazan 420008, Russia
7.St Petersburg State Univ, 7 9 Univ skaya nab, St Petersburg 199034, Russia
8.Coll New Jersey, Dept Phys, 2000 Pennington Rd, Ewing, NJ 08628 USA
9.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China
10.Univ Michigan, Dept Astron, 1085 S Univ Ave, Ann Arbor, MI 48109 USA
推荐引用方式
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.

入库方式： OAI收割

来源：新疆天文台

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。