NAOC Open IR
Model fitting of the kinematics of ten superluminal components in Blazar 3C 279
Qian Shanjie
2013
Source PublicationResearch in Astronomy and Astrophysics
ISSN1674-4527
Volume13Issue:7Pages:783
AbstractThe 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.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/53187
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
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.
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