Active galactic nuclei imaging programs of the RadioAstron mission |
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| Institution: | 1. INAF – Istituto di Astrofisica e Planetologia Spaziali, via del Fosso del Cavaliere 100, 00133 Rome, Italy;2. Aalto University Department of Electronics and Nanoengineering, PL 15500, FI-00076 Aalto, Finland;3. Aalto University Metsähovi Radio Observatory, Metsähovintie 114, 02540 Kylmälä, Finland;4. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany;5. Instituto de Astrofísica de Andalucía, CSIC, Glorieta de la Astronomía s/n, 18008 Granada, Spain;6. Astro Space Center of Lebedev Physical Institute, Profsoyuznaya St. 84/32, 117997 Moscow, Russia;7. Institute of Physics and Technology, Dolgoprudny, Institutsky per., 9, Moscow region, 141700, Russia |
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| 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 (3C 84, BL Lac, 3C 273, S5 0836 + 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. |
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| Keywords: | Techniques Radio interferometry Active galactic nuclei |
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