Transverse motions in CSOs?
文献类型：期刊论文
| 作者 | Stanghellini, C.1; Dallacasa, D.1,2; Venturi, T.1; An, T.3 ; Hong, X. Y.3
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| 刊名 | ASTRONOMISCHE NACHRICHTEN
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| 出版日期 | 2009-03-01 |
| 卷号 | 330期号:2-3页码:153-156 |
| 关键词 | galaxies: active radio continuum: galaxies quasars: general |
| 英文摘要 | The measurement of proper motions in CSOs is a powerful tool to determine the dynamical evolution of the newly born extragalactic radio sources. We observed 3 CSOs with the VLBA in 2004 and in 2006 to monitor changes in their structure and measure the separation velocity of the hot spots. It is important to increase the size of the samples of CSOs with measured expansion velocity to test the existence of frustrated objects, and put stringent constraints on the current models. We found for all the three objects observed a transverse motion of the hot-spots, and we suggest as the more likely explanation a precession in the jet axis. This behaviour likely inhibits or at least slows down the radio source growth because the head of the hot-spot continuously hits new regions of the ISM. Therefore these radio sources may represent an old population of GPS/CSOs. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SPECTRUM RADIO-SOURCES ; COMPACT SYMMETRIC OBJECTS ; SAMPLE ; GALAXIES ; AGES ; GHZ |
| 收录类别 | SCI ; ISTP |
| 语种 | 英语 |
| WOS记录号 | WOS:000264306600009 |
| 源URL | [http://119.78.226.72/handle/331011/19966]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Ist Radioastron INAF, I-40129 Bologna, Italy 2.Univ Bologna, Dipartimento Astron, I-40127 Bologna, Italy 3.Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Stanghellini, C.,Dallacasa, D.,Venturi, T.,et al. Transverse motions in CSOs?[J]. ASTRONOMISCHE NACHRICHTEN,2009,330(2-3):153-156. |
| APA | Stanghellini, C.,Dallacasa, D.,Venturi, T.,An, T.,&Hong, X. Y..(2009).Transverse motions in CSOs?.ASTRONOMISCHE NACHRICHTEN,330(2-3),153-156. |
| MLA | Stanghellini, C.,et al."Transverse motions in CSOs?".ASTRONOMISCHE NACHRICHTEN 330.2-3(2009):153-156. |
入库方式： OAI收割
来源：上海天文台
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