Active galactic nuclei imaging programs of the RadioAstron mission

Gabriele Bruni, Tuomas Savolainen, Jose Luis Gómez, Andrei P. Lobanov, Yuri Y. Kovalev

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Imaging relativistic jets in active galactic nuclei (AGN) at angular resolution significantly surpassing that of the ground-based VLBI at centimetre wavelengths is one of the key science objectives of the RadioAstron space-VLBI mission. There are three RadioAstron imaging key science programs that target both nearby radio galaxies and blazars, with one of the programs specifically focusing on polarimetry of the jets. The first images from these programs reach angular resolution of a few tens of microarcseconds and reveal unprecedented details about the jet collimation profile, magnetic field configuration, and Kelvin-Helmholtz instabilities along the flow in some of the most studied AGN (3C84, BL Lac, 3C273, S50836+710). Here we give an overview of the goals and strategy of these three ongoing programs, highlight their early results, and discuss the challenges of space-VLBI imaging.
Original languageEnglish
Pages (from-to)712-719
JournalAdvances in Space Research
Volume65
Issue number2
Early online date2019
DOIs
Publication statusPublished - Jan 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • techniques
  • radio interferometry
  • active galactic nuclei

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