We studied the radio structure of high-redshift (z>3) quasars with VSOP at 1.6 and 5 GHz. These sources are the most distant objects ever observed with Space VLBI, at rest-frame frequencies up to ~25 GHz. Here we give an account of the observations and briefly highlight the most interesting cases and results. These observations allowed us, among other things, to estimate the mass of the central black holes powering these quasars, to identify large misalignments between the milli-arcsecond (mas) and sub-mas scale radio structures, and to detect apparent superluminal motion at sub-mas scale.
@article{arxiv.0801.4864,
title = {High-Redshift Quasars at the Highest Resolution: VSOP Results},
author = {S. Frey and L. I. Gurvits and A. P. Lobanov and R. T. Schilizzi and Z. Paragi},
journal= {arXiv preprint arXiv:0801.4864},
year = {2008}
}
Comments
3 pages; proceedings of the symposium "Approaching Micro-Arcsecond Resolution with VSOP-2: Astrophysics and Technology" (ISAS/JAXA, Sagamihara, Japan, 3-7 Dec 2007). Astronomical Society of the Pacific Conference Series, eds. Hagiwara Y., Fomalont E.B., Tsuboi M., Murata Y., in press