0000000001304925

AUTHOR

Savolainen T.

showing 3 related works from this author

S5 0836+710 Ground and Space VLBI images

2020

Detailed studies of relativistic jets in active galactic nuclei (AGN) require high-fidelity imaging at the highest possible resolution. This can be achieved using very long baseline interferometry (VLBI) at radio frequencies, combining worldwide (global) VLBI arrays of radio telescopes with a space-borne antenna on board a satellite. We present multiwavelength images made of the radio emission in the powerful quasar S5 0836+710, obtained using a global VLBI array and the antenna Spektr-R of the RadioAstron mission of the Russian Space Agency, with the goal of studying the internal structure and physics of the relativistic jet in this object. The RadioAstron observations at wavelengths of 18…

galactic and extragalactic astronomyAstrophysics and Astronomyhigh energy astrophysicsRadio sourcesAstrophysics::High Energy Astrophysical PhenomenaPhysicsAstrophysics::Cosmology and Extragalactic Astrophysicsstellar astronomyCosmologyobservational astronomyRadio astronomyNatural SciencesQuasarsVery long baseline interferometry
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MOJAVE. VI. Kinematic analysis of blazar jets

2012

We discuss the jet kinematics of a complete flux-density-limited sample of 135 radio-loud active galactic nuclei (AGNs) resulting from a 13 year program to investigate the structure and evolution of parsec-scale jet phenomena. Our analysis is based on new 2cm Very Long Baseline Array (VLBA) images obtained between 2002 and 2007, but includes our previously published observations made at the same wavelength, and is supplemented by VLBA archive data. In all, we have used 2424 images spanning the years 1994-2007 to study and determine the motions of 526 separate jet features in 127 jets. Cone search capability for table J/AJ/138/1874/agn (AGN sample)

galactic and extragalactic astronomyAstrophysics and AstronomyActive galactic nucleihigh energy astrophysicsRadio sourcesAstrophysics::High Energy Astrophysical PhenomenaPhysicsAstrophysics::Cosmology and Extragalactic Astrophysicsstellar astronomyCosmologyobservational astronomyBL Lacertae objectsRadio astronomyNatural SciencesQuasarsAstrophysics::Galaxy Astrophysics
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22GHz image of 3C 273

2017

RadioAstron is a 10m orbiting radio telescope mounted on the Spektr-R satellite, launched in 2011, performing Space Very Long Baseline Interferometry (SVLBI) observations supported by a global ground array of radio telescopes. With an apogee of ~350000km, it is offering for the first time the possibility to perform as-resolution imaging in the cm-band. The RadioAstron Active Galactic Nuclei (AGN) polarization Key Science Project (KSP) aims at exploiting the unprecedented angular resolution provided by RadioAstron to study jet launching/collimation and magnetic-field configuration in AGN jets. The targets of our KSP are some of the most powerful blazars in the sky. We present observations at…

galactic and extragalactic astronomyAstrophysics and AstronomyActive galactic nucleihigh energy astrophysicsRadio sourcesPhysicsAstrophysics::High Energy Astrophysical PhenomenaAstrophysics::Instrumentation and Methods for AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsCosmologyobservational astronomyMagnetic fieldsRadio astronomyAstrophysical ProcessesNatural SciencesAstrophysics::Galaxy Astrophysics
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