Bending of jets in the QSO NRAO 530
文献类型：期刊论文
| 作者 | Hong, Xiao-Yu1; Sun, Chuan-Hao1,2; Zhao, Jun-Hui3; Jiang, Dong-Rong1; Shen, Zhi-Qiang1; An, Tao1 ; Wang, Wei-Hua1; Yang, Jun1,2
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| 刊名 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2008-04-01 |
| 卷号 | 8期号:2页码:179-194 |
| 关键词 | galaxies : nuclei galaxies : jets quasars : individual : NRAO 530 |
| 通讯作者 | Chinese Journal Astronomy and Astrophysics |
| 英文摘要 | We present radio images of NRAO 530 on scales ranging from pc to kpc. The observations include the EVN at 5 GHz, the VLBA at 1.6, 8.6 and 15 GHz, the MERLIN at 1.6 and 5 GHz, and the VLA at 5, 8.4, 15, 22, and 43 GHz. The VLBI images show a core-jet structure with an oscillating trajectory on a scale of about 30 mas north of the strongest compact component (core). Superluminal motions are detected in five of the jet components with apparent velocities in the range of 13.6 to 25.2c. A new component is detected at 15 GHz with the VLBA observations, which appears to be associated with the outburst in 2002. Significant polarized emission is detected around the core with the VLBA observations at 15 GHz. Rapid variations of the polarization intensity and angle are found between the epochs in 2002 and 2004. On the kpc-scale, a distant component (labelled as WL) located 11 aresec west (PA=-86 degrees) of the core is detected beyond the core-jet structure which extended to several hundreds of mas in the north-west direction (-50 degrees). A significant emission between the core-jet structure and the WL is revealed. A clump of diffuse emission (labelled EL, 12 arcsec long) at PA 70 degrees to the core, is also detected in the VLA observations, suggesting the presence of double lobes in the source. The core component shows a flat spectrum, while the distant components WL and EL have steep spectra. The steep spectra of the distant components and the detection of the arched emission suggest that the distant components are lobes or hot-spots powered by the core of NRAO 530. The morphologies from pc- to kpc-scales and the bending of jets are investigated. The observed radio morphology from pc to kcp appears to favor the model in which precession or wobbling of the nuclear disk drives the helical motion of the radio plasma and produces the S-shaped structure on kpc scale. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | 射电天文学 |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | EXTRAGALACTIC RADIO-SOURCES ; ACTIVE GALACTIC NUCLEI ; VLBI OBSERVATIONS ; EQUIPARTITION ; HEMISPHERE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000255262600005 |
| 公开日期 | 2010-04-29 |
| 源URL | [http://119.78.226.72//handle/331011/8099]  |
| 专题 | 上海天文台_VLBI研究室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA |
| 推荐引用方式 GB/T 7714 | Hong, Xiao-Yu,Sun, Chuan-Hao,Zhao, Jun-Hui,et al. Bending of jets in the QSO NRAO 530[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2008,8(2):179-194. |
| APA | Hong, Xiao-Yu.,Sun, Chuan-Hao.,Zhao, Jun-Hui.,Jiang, Dong-Rong.,Shen, Zhi-Qiang.,...&Yang, Jun.(2008).Bending of jets in the QSO NRAO 530.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,8(2),179-194. |
| MLA | Hong, Xiao-Yu,et al."Bending of jets in the QSO NRAO 530".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 8.2(2008):179-194. |
入库方式： OAI收割
来源：上海天文台
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