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Multi-frequency VLBA study of the blazar S5 0716+714 during the active state in 2004: I. Inner jet kinematics


Rastorgueva, E and Wiik, K and Savolainen, T and Takalo, LO and Valtaoja, E and Vetukhnovskaya, YN and Sokolovsky, KV, Multi-frequency VLBA study of the blazar S5 0716+714 during the active state in 2004: I. Inner jet kinematics, Astronomy and Astrophysics, 494 pp. L5-L8. ISSN 0004-6361 (2009) [Refereed Article]


Copyright Statement

Copyright 2009 ESO

DOI: doi:10.1051/0004-6361:200811425


We observed the blazar 0716+714 with the VLBA during its active state in 20032004. In this paper we discuss multi-frequency analysis of the inner jet (first 1 mas) kinematics. The unprecedentedly dense time sampling allows us to trace jet components without misidentification and to calculate the component speeds with good accuracy. In the smooth superluminal jet we were able to identify and track three components over time moving outwards with relatively high apparent superluminal speeds (8.519.4 c), which contradicts the hypothesis of a stationary oscillating jet in this source. Component ejections occur at a relatively high rate (once in two months), and they are accompanied by mm-continuum outbursts. Superluminal jet components move along wiggling trajectories, which is an indication of actual helical motion. Fast proper motion and rapid decay of the components suggest that this source should be observed with the VLBI at a rate of at least once in one or two months in order to trace superluminal jet components without confusion.

Item Details

Item Type:Refereed Article
Keywords:galaxies, active-galaxies, BL Lacertae objects, individual, S5 0716+714 galaxies, jets
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Cosmology and extragalactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Rastorgueva, E (Dr Elizaveta Rastorgueva-Foi)
ID Code:93355
Year Published:2009
Web of Science® Times Cited:10
Deposited By:Mathematics and Physics
Deposited On:2014-07-29
Last Modified:2014-08-11
Downloads:269 View Download Statistics

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