Progress of research on AGNs at the Urumqi Observatory
文献类型：期刊论文
| 作者 | Cui Lang1,2 ; Song HuaGang1; Liu Jun1,2; Liu Xiang1; Krichbaum, T. P.3; Fuhrmann, L.3; Marchili, N.3
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| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
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| 出版日期 | 2010 |
| 卷号 | 53期号:增刊1页码:244-246 |
| 关键词 | active galactic nuclei VLBI intra-day variability |
| ISSN号 | 1674-7348 |
| 通讯作者 | liux@xao.ac.cn) |
| 英文摘要 | We report the progress on Very Long Baseline Interferometry (VLBI) observations of Gigahertz Peaked Spectrum (GPS) radio sources, and single-dish observations of active galactic nuclei (AGNs). The GPS sources are a kind of young AGNs observable in radio. From our VLBI observations at 1.6 and 5 GHz with the European VLBI Network (EVN) including the Urumqi and Shanghai stations, most GPS sources show compact doubles with sizes less than 1 kiloparsec. We have classified the sources into double-lobes, core-jets, and complex structures according to the spectral indices as well as images. We also estimated the values of the jet viewing angle for the symmetric objects. In addition, we are monitoring a few samples of AGNs with the Urumqi 25-meter radio telescope, in order to find flux variability. We detected rapid flux variability in quasar 1156+295, and relatively slow variability in a few of the others. The origin of the rapid variability is discussed. Moreover, we launched a radio-optical monitoring program called Fermi-AGN in 2009. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | 星系和宇宙学 |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | GPS RADIO-SOURCES ; VARIABILITY ; SPECTRUM |
| 收录类别 | SCI |
| 资助信息 | National Basic Research Program of China (Grant No. 2009CB824800);National Natural Science Foundation of China ((Grant No. 10773019) |
| 原文出处 | http://phys.scichina.com:8083/sciGe/EN/volumn/home.shtml |
| 语种 | 英语 |
| WOS记录号 | WOS:000280291800056 |
| 公开日期 | 2013-03-06 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/162]  |
| 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 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Urumqi Observ, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Max Planck Inst Radioastron, D-53121 Bonn, Germany |
| 推荐引用方式 GB/T 7714 | Cui Lang,Song HuaGang,Liu Jun,et al. Progress of research on AGNs at the Urumqi Observatory[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2010,53(增刊1):244-246. |
| APA | Cui Lang.,Song HuaGang.,Liu Jun.,Liu Xiang.,Krichbaum, T. P..,...&Marchili, N..(2010).Progress of research on AGNs at the Urumqi Observatory.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,53(增刊1),244-246. |
| MLA | Cui Lang,et al."Progress of research on AGNs at the Urumqi Observatory".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 53.增刊1(2010):244-246. |
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来源：新疆天文台
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