Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-12-16
Astron.Astrophys. 433 (2005) 815
Astronomy and Astrophysics
Astrophysics
12 pages, 9 figures, accepted for publication in A&A, minor language editing and a reference added in section 1 to match the a
Scientific paper
10.1051/0004-6361:20040388
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 ~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 for 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.
Bach Uwe
Britzen Silke
Kraus Adam
Krichbaum Thomas P.
Ros Eduardo
No associations
LandOfFree
Kinematic Study of the Blazar S5 0716+714 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Kinematic Study of the Blazar S5 0716+714, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinematic Study of the Blazar S5 0716+714 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-627884