High-sensitivity AGN polarimetry at sub-millimeter wavelengths
Artikel i vetenskaplig tidskrift, 2017

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.

Graviational lenses

B0218+359

PKS 1830-211

Interferometry

Polarization

Active galactic nuclei

Författare

Ivan Marti-Vidal

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Sebastien Muller

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Vol. 5 65

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.3390/galaxies5040065