Galaxies around the giant double radio source DA 240 - Redshifts and the discovery of an unusual association
文献类型：期刊论文
| 作者 | Peng, B ; Strom, RG; Wei, J; Zhao, YH
|
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2004-02-01 |
| 卷号 | 415期号:2页码:487-498 |
| 关键词 | galaxies : active galaxies : individual : DA 240 galaxies : ISM galaxies : distances and redshifts techniques : spectroscopic ISM : jets and outflows |
| 英文摘要 | We have investigated galaxies near the giant radio source DA 240 in a study of the source's environment. Spectroscopic observations were obtained with the 2.16 m optical telescope of the National Astronomical Observatories of China. We have measured the redshifts of 26 objects, and find that 16 have nearly the same value as the DA 240 galaxy, and hence form a substantial group. Most of the others have lower redshifts and are probably outlying members of the Zwicky cluster Zw 0756.1+5616. We note that the radio galaxy host dominates the group. Ten of the galaxies in the group are aligned with the lobes of the radio source, and eight are projected on the components. We suggest that there may be a causal relationship, and find some evidence for enhanced activity among these galaxies. Moreover, there is a gradient in their velocities along the source axis. Whatever its explanation, we suggest that it establishes a dynamic timescale of some 10(9) yr. This may have been the time since the last merger, which triggered the giant radio source. The individual galaxy spectra are also presented and briefly discussed. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000188936100016 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8143]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.ASTRON, NL-7990 AA Dwingeloo, Netherlands 3.Univ Amsterdam, Astron Inst, NL-1012 WX Amsterdam, Netherlands |
| 推荐引用方式 GB/T 7714 | Peng, B,Strom, RG,Wei, J,et al. Galaxies around the giant double radio source DA 240 - Redshifts and the discovery of an unusual association[J]. ASTRONOMY & ASTROPHYSICS,2004,415(2):487-498. |
| APA | Peng, B,Strom, RG,Wei, J,&Zhao, YH.(2004).Galaxies around the giant double radio source DA 240 - Redshifts and the discovery of an unusual association.ASTRONOMY & ASTROPHYSICS,415(2),487-498. |
| MLA | Peng, B,et al."Galaxies around the giant double radio source DA 240 - Redshifts and the discovery of an unusual association".ASTRONOMY & ASTROPHYSICS 415.2(2004):487-498. |
入库方式： OAI收割
来源：国家天文台
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。