The jet of S5 0716+71 at $mu$as scales with RadioAstron. (arXiv:1902.04369v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Kravchenko_E/0/1/0/all/0/1">E. V. Kravchenko</a> (INAF-IRA Bologna, ASC Lebedev), <a href="http://arxiv.org/find/astro-ph/1/au:+Gomez_J/0/1/0/all/0/1">J. L. Gómez</a> (IAA-Granada), <a href="http://arxiv.org/find/astro-ph/1/au:+Kovalev_Y/0/1/0/all/0/1">Y. Y. Kovalev</a> (ASC Lebedev, MIPT, MPIfR), <a href="http://arxiv.org/find/astro-ph/1/au:+Voytsik_P/0/1/0/all/0/1">P. A. Voytsik</a> (ASC Lebedev)
Ground-space interferometer RadioAstron provides unique opportunity to probe
detail structure of the distant active galactic nuclei at $mu$as scales. Here
we report on RadioAstron observations of the BL Lac object S5 0716$+$71,
performed in a framework of the AGN Polarization and Survey Key Science
Programs at 22 GHz during 2012-2018. We obtained the highest angular resolution
image of the source to date, at $57times24 mu$as. It reveals complex
structure of the blazar jet in the inner 100 $mu$as, with emission regions
that can be responsible for the blazar variability at timescales of a few days
to week. Linear polarization is detected in the core and jet areas at the
projected baselines up to about $5.6$ Earth diameters. The observed core
brightness temperature in the source frame of $geq2.2times10^{13}$ K is in
excess of theoretical limits, suggesting the physical conditions are far from
the equipartition between relativistic particles and magnetic field.
Ground-space interferometer RadioAstron provides unique opportunity to probe
detail structure of the distant active galactic nuclei at $mu$as scales. Here
we report on RadioAstron observations of the BL Lac object S5 0716$+$71,
performed in a framework of the AGN Polarization and Survey Key Science
Programs at 22 GHz during 2012-2018. We obtained the highest angular resolution
image of the source to date, at $57times24 mu$as. It reveals complex
structure of the blazar jet in the inner 100 $mu$as, with emission regions
that can be responsible for the blazar variability at timescales of a few days
to week. Linear polarization is detected in the core and jet areas at the
projected baselines up to about $5.6$ Earth diameters. The observed core
brightness temperature in the source frame of $geq2.2times10^{13}$ K is in
excess of theoretical limits, suggesting the physical conditions are far from
the equipartition between relativistic particles and magnetic field.
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