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题名: MULTI-EPOCH MULTI-FREQUENCY VLBI STUDY OF THE PARSEC-SCALE JET IN THE BLAZAR 3C 66A
作者: Zhao, Guang-Yao1, 2; Chen, Yong-Jun1, 3; Shen, Zhi-Qiang1, 3; Sudou, Hiroshi4; Iguchi, Satoru5
刊名: ASTRONOMICAL JOURNAL
出版日期: 2015-02-01
卷号: 149, 期号:2
关键词: galaxies: individual (3C 66A) ; galaxies: jets ; radio continuum: galaxies
DOI: 10.1088/0004-6256/149/2/46
文章类型: Article
英文摘要: We present observational results of the gamma-ray blazar 3C 66A at 2.3, 8.4, and 22 GHz at four epochs during 2004-2005 with the VLBA. The resulting images show an overall core-jet structure extending roughly to the south, with two intermediate breaks occurring in the region near the core. By model-fitting to the visibility data, the northmost component, which is also the brightest, is identified as the core according to its relatively flat spectrum and its compactness. Combining our results with previous results to investigate the proper motions of the jet components, we found the kinematics of 3C 66A to be quite complicated, with components of inward and outward, subluminal and superluminal motions all detected in the radio structure. The superluminal motions indicate strong Doppler boosting exists in the jet. The apparent inward motions of the innermost components last for at least 10 years and could not be caused by newborn components. A possible reason could be non-stationarity of the core due to opacity change.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: ACTIVE GALACTIC NUCLEI ; COMPACT RADIO-SOURCES ; BL LACERTAE OBJECTS ; RAY BRIGHT BLAZARS ; BASE-LINE ARRAY ; SUPERLUMINAL MOTION ; HIGH-FREQUENCY ; KINEMATICS ; FERMI ; QUASARS
收录类别: SCI
语种: 英语
WOS记录号: WOS:000349360200011
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15778
Appears in Collections:毫米波和亚毫米波技术实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
2.Korea Astron & Space Sci Inst, Taejon 305348, South Korea
3.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100864, Peoples R China
4.Gifu Univ, Fac Engn, Gifu 5011193, Japan
5.Natl Astron Observ Japan, Tokyo 1818588, Japan
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