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Galaxies 2017, 5(4), 65;

High-Sensitivity AGN Polarimetry at Sub-Millimeter Wavelengths

Onsala Space Observatory, Department of Space Earth and Environment, Chalmers University of Technology, 41258 Gothenburg, Sweden
Author to whom correspondence should be addressed.
Academic Editors: Emmanouil Angelakis, Markus Boettcher and Jose L. Gómez
Received: 31 August 2017 / Revised: 17 September 2017 / Accepted: 25 September 2017 / Published: 15 October 2017
(This article belongs to the Special Issue Polarised Emission from Astrophysical Jets)
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The innermost regions of radio loud Active Galactic Nuclei (AGN) jets are heavily affected by synchrotron self-absorption, due to the strong magnetic fields and high particle densities in these extreme zones. The only way to overcome this absorption is to observe at sub-millimeter wavelengths, although polarimetric observations at such frequencies have so far been limited by sensitivity and calibration accuracy. However, new generation instruments such as the Atacama Large mm/sub-mm Array (ALMA) overcome these limitations and are starting to deliver revolutionary results in the observational studies of AGN polarimetry. Here we present an overview of our state-of-the-art interferometric mm/sub-mm polarization observations of AGN jets with ALMA (in particular, the gravitationally-lensed sources PKS 1830−211 and B0218+359), which allow us to probe the magneto-ionic conditions at the regions closest to the central black holes. View Full-Text
Keywords: Active galactic nuclei; Graviational lenses; Polarization; Interferometry; PKS 1830-211; B0218+359 Active galactic nuclei; Graviational lenses; Polarization; Interferometry; PKS 1830-211; B0218+359

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Martí-Vidal, I.; Muller, S. High-Sensitivity AGN Polarimetry at Sub-Millimeter Wavelengths. Galaxies 2017, 5, 65.

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