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Kinematic study of the blazar S5 0716+714
Bach, U; Krichbaum, TP; Ros, E; Britzen, S; Tian, WW; Kraus, A; Witzel, A; Zensus, JA
2005-04-01
发表期刊ASTRONOMY & ASTROPHYSICS
卷号433期号:3页码:815-825
摘要We present the results of a multi-frequency study of the structural evolution of the VLBI jet in the BL Lac object 0716+714 over the last 10 years. We show VLBI images obtained at 5 GHz, 8.4 GHz, 15 GHz and 22 GHz. The milliarcsecond source structure is best described by a one-sided core-dominated jet of similar to 10 mas length. Embedded jet components move superluminally with speeds ranging from 5 c to 16 c ( assuming z = 0.3). Such fast superluminal motion is not typical of BL Lac objects, however it is still in the range of jet speeds typically observed in quasars ( 10 c to 20 c). In 0716+714, younger components that were ejected more recently seem to move systematically slower than the older components. This and a systematic position angle variation of the inner (1 mas) portion of the VLBI jet suggests an at least partly geometric origin of the observed velocity variations. The observed rapid motion and the derived Lorentz factors are discussed with regard to the rapid Intra-Day Variability (IDV) and the gamma-ray observations, from which very high Doppler factors are inferred.
关键词Galaxies : Jets Galaxies : Bl Lacertae Objects : Individual : S5 0716+714 Radio Continuum : Galaxies
DOI10.1051/0004-6361:20040388
收录类别SCI
语种英语
WOS记录号WOS:000228039100009
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被引频次:52[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8953
专题光学天文研究部
作者单位1.Max Planck Inst Radioastron, D-53121 Bonn, Germany
2.Landessternwarte Heidelberg, Konigstuhl 17, D-69117 Heidelberg, Germany
3.Acad Sinica, Natl Astron Observ, Beijing 100012, Peoples R China
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Bach, U,Krichbaum, TP,Ros, E,et al. Kinematic study of the blazar S5 0716+714[J]. ASTRONOMY & ASTROPHYSICS,2005,433(3):815-825.
APA Bach, U.,Krichbaum, TP.,Ros, E.,Britzen, S.,Tian, WW.,...&Zensus, JA.(2005).Kinematic study of the blazar S5 0716+714.ASTRONOMY & ASTROPHYSICS,433(3),815-825.
MLA Bach, U,et al."Kinematic study of the blazar S5 0716+714".ASTRONOMY & ASTROPHYSICS 433.3(2005):815-825.
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