Model fitting of the kinematics of ten superluminal components in Blazar 3C 279
文献类型：期刊论文
| 作者 | Qian Shanjie |
| 刊名 | Research in Astronomy and Astrophysics
 |
| 出版日期 | 2013 |
| 卷号 | 13期号:7页码:783 |
| ISSN号 | 1674-4527 |
| 英文摘要 | The kinematics of ten superluminal components (C11-C16, C18, C20, C21 and C24) of blazar 3C 279 are studied from VLBI observations. It is shown that their initial trajectory, distance from the core and apparent speed can be well fitted by the precession model proposed by Qian. Combined with the results of the model fit for the six superluminal components (C3, C4, C7a, C8, C9 and C10) already published, the kinematics of sixteen superluminal components can now be consistently interpreted in the precession scenario with their ejection times spanning more than 25 yr (or more than one precession period). The results from model fitting show the possible existence of a common precessing trajectory for these knots within a projected core distance of similar to 0.2-0.4 mas. In the framework of the jet-precession scenario, we can, for the first time, identify three classes of trajectories which are characterized by their collimation parameters. These different trajectories could be related to the helical structure of magnetic fields in the jet. Through fitting the model, the bulk Lorentz factor, Doppler factor and viewing angle of these knots are derived. It is found that there is no evidence for any correlation between the bulk Lorentz factor of the components and their precession phase (or ejection time). In a companion paper, the kinematics of another seven components (C5a, C6, C7, C17, C19, C22 and C23) have been derived from model fitting, and a binary black-hole/jet scenario was envisaged. The precession model proposed by Qian would be useful for understanding the kinematics of superluminal components in blazar 3C 279 derived from VLBI observations, by disentangling different mechanisms and ingredients. More generally, it might also be helpful for studying the mechanism of jet swing (wobbling) in other blazars. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/53186]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 中国科学院国家天文台 |
| 推荐引用方式 GB/T 7714 | Qian Shanjie. Model fitting of the kinematics of ten superluminal components in Blazar 3C 279[J]. Research in Astronomy and Astrophysics,2013,13(7):783. |
| APA | Qian Shanjie.(2013).Model fitting of the kinematics of ten superluminal components in Blazar 3C 279.Research in Astronomy and Astrophysics,13(7),783. |
| MLA | Qian Shanjie."Model fitting of the kinematics of ten superluminal components in Blazar 3C 279".Research in Astronomy and Astrophysics 13.7(2013):783. |
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。