S E M I N A R IDepartament d'Astronomia i Astrofísica
Universitat de València
High resolution observations with RadioAstron of VLBI jets
Max-Planck-Institut für Radioastronomie, Bonn, Alemanya
Seminari del departament d'Astronomia i Astrofísica
Dijous 21 setembre 2017
Space VLBI observations with RadioAstron provide a remarkable improvement of angular resolution. The RadioAstron Key Science Program "Structure and Physics of Compact Jets in AGN" exploits this opportunity by detailed, multifrequency imaging of a number of selected extragalactic radio sources. In this talk, I present the results obtained from the KSP observations of the relativistic jet in the quasar 0836+710 at 1.6, 5, and 22 GHz. The space VLBI images of the jet reveal a strongly transversely resolved flow, with a wealth of structure on scales ranging from 0.2 to 150 milliarcseconds. At 22GHz, the source shows also asymmetries that need to be further investigated. The multifrequency data set can be used to study spectral morphology of the jet and obtain some physical parameters. The high resolution images of another two sources will also be presented: 1642+690, and 3C273.