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Multi-frequency VLBA study of the blazar S5 0716+714 during the active state in 2004: I. Inner jet kinematics
Citation
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]
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Copyright Statement
Copyright 2009 ESO
DOI: doi:10.1051/0004-6361:200811425
Abstract
We observed the blazar 0716+714 with the VLBA during its active state in 2003–2004. 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 (8.5–19.4 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 |
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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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