Dual frequency VSOP imaging of the jet in S5 0836+710
Abstract
The luminous high-redshift (z=2.17) quasar S50836+710 has been observed in October 1997 with the VSOP at 1.6 GHz and 5 GHz. We report here a previously unpublished image made from the data at 1.6 GHz and compare the structure of a relativistic jet in this quasazr at the two frequencies. We present a spectral index image tracing spectral properties of the jet up to ~40 milliarcsecond distance from the nucleus. The curved jet ridge line observed in the images and the spectral index distribution can be described by Kelvin-Helmholtz instability developing in a relativistic outflow with a Mach number of ~6. In this description, the overall ridge line of the jet is formed by the helical surface mode of Kelvin-Helmholtz instability, while areas of flatter spectral index embedded into the flow correspond to pressure enhancements produced by the elliptical surface mode of the instability. An alternative explanation involving a sequence of slowly dissipating shocks cannot be ruled out at this point.
Keywords
Cite
@article{arxiv.astro-ph/0507667,
title = {Dual frequency VSOP imaging of the jet in S5 0836+710},
author = {A. P. Lobanov and T. P. Krichbaum and A. Witzel and J. A. Zensus},
journal= {arXiv preprint arXiv:astro-ph/0507667},
year = {2015}
}
Comments
7 pages, 4 figures, pasj00.cls. Submitted to PASJ. (Corrected figure orientation)