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Correlations between the peak flux density and the position angle of inner-jet in three blazars
Liu, Xiang1,2; Mi, Ligong1,3; Liu, Baorong1,3,4; Li, Quanwei1,3; Liu,X
2012-12-01
Source PublicationASTROPHYSICS AND SPACE SCIENCE
ISSN0004-640X
Volume342Issue:2Pages:465-473
AbstractWe aim to investigate the relation between the long-term flux density and the position angle (PA) evolution of inner-jet in blazars. We have carried out the elliptic Gaussian model-fit to the 'core' of 50 blazars from 15 GHz VLBA data, and analyzed the variability properties of three blazars from the model-fit results. Diverse correlations between the long-term peak flux density and the PA evolution of the major axis of the 'core' have been found in similar to 20 % of the 50 sources. Of them, three typical blazars have been analyzed, which also show quasi-periodic flux variations of a few years (T). The correlation between the peak flux density and the PA of inner-jet is positive for S5 0716+714, and negative for S4 1807+698. The two sources cannot be explained with the ballistic jet models, the non-ballistic models have been analyzed to explain the two sub-luminal blazars. A correlation between the peak flux density and the PA (with a T/4 time lag) of inner-jet is found in [HB89] 1823+568, this correlation can be explained with a ballistic precession jet model. All the explanations are based mainly on the geometric beaming effect; physical flux density variations from the jet base would be considered for more complicated situations in future, which could account for the no or less significance of the correlation between the peak flux density and the PA of inner-jet in the majority blazars of our sample.
KeywordBl Lacertae Objects: Individual: S5 0716+714, 3c 371, 4c+56.27 Radio Continuum: Galaxies Galaxies: Jets
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s10509-012-1191-6
WOS KeywordACTIVE GALACTIC NUCLEI ; BL LACERTAE OBJECTS ; GAMMA-RAY ; COMPLETE SAMPLE ; LAC OBJECTS ; S5 0716+714 ; RADIO JETS ; DOPPLER FACTORS ; VARIABILITY ; KINEMATICS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000310222700021
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10098
Collection期刊(老文献)
Corresponding AuthorLiu,X
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
4.Guangxi Univ, Coll Phys Sci & Technol, Nanning 530004, Guangxi, Peoples R China
Recommended Citation
GB/T 7714
Liu, Xiang,Mi, Ligong,Liu, Baorong,et al. Correlations between the peak flux density and the position angle of inner-jet in three blazars[J]. ASTROPHYSICS AND SPACE SCIENCE,2012,342(2):465-473.
APA Liu, Xiang,Mi, Ligong,Liu, Baorong,Li, Quanwei,&Liu,X.(2012).Correlations between the peak flux density and the position angle of inner-jet in three blazars.ASTROPHYSICS AND SPACE SCIENCE,342(2),465-473.
MLA Liu, Xiang,et al."Correlations between the peak flux density and the position angle of inner-jet in three blazars".ASTROPHYSICS AND SPACE SCIENCE 342.2(2012):465-473.
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