We determined the kinematics at the jet of 0716+714 from a reanalysis of multi-frequency VLBI data (5, 8.4, 15, 22 GHz) obtained during the last 10 years combined with data from the literature. For this intra-day variable blazar, only a lower limit of its distance is known (z >= 0.3). We find that 0716+714 is a relatively fast superluminal source (with a Lorentz factor of gamma >15), revising earlier results showing much slower motions. We discuss the new findings with emphasis on the interpretation of the observed rapid radio variability.
@article{arxiv.astro-ph/0309404,
title = {Kinematic Study of the Blazar 0716+714},
author = {U. Bach and T. P. Krichbaum and S. Britzen and E. Ros and A. Witzel and J. A. Zensus},
journal= {arXiv preprint arXiv:astro-ph/0309404},
year = {2007}
}
Comments
To be published in "Future Directions in High Resolution Astronomy" (Celebration of the 10th Anniversary of the Very Long Baseline Array), ASP Conference Series. 3 pages, 2 figures