Park, Jongho and Algaba, Juan Carlos (2022) Polarization observations of AGN jets: Past and future. Galaxies, 10 (5). ISSN 20754434, DOI https://doi.org/10.3390/galaxies10050102.
Full text not available from this repository.Abstract
The magnetic field is believed to play a critical role in the bulk acceleration and propagation of jets produced in active galactic nuclei (AGN). Polarization observations of AGN jets provide valuable information about their magnetic fields. As a result of radiative transfer, jet structure, and stratification, among other factors, it is not always straightforward to determine the magnetic field structures from observed polarization. We review these effects and their impact on polarization emission at a variety of wavelengths, including radio, optical, and ultraviolet wavelengths in this paper. It is also possible to study the magnetic field in the launching and acceleration regions of AGN jets by using very long baseline interferometry (VLBI), which occurs on a small physical scale. Due to the weak polarization of the jets in these regions, probing the magnetic field is generally difficult. However, recent VLBI observations have detected significant polarization and Faraday rotation in some nearby sources. We present the results of these observations as well as prospects for future observations. Additionally, we briefly discuss recently developed polarization calibration and imaging techniques for VLBI data, which enable more in-depth analysis of the magnetic field structure around supermassive black holes and in AGN jets. © 2022 by the authors.
| Item Type: | Article |
|---|---|
| Funders: | Chinese Academy of Sciences, Korea Astronomy and Space Science Institute, Universiti Malaya [Grant No: GPF081-2020] |
| Uncontrolled Keywords: | Accretion; Accretion disks; Black hole physics; Galaxies; Active; Galaxies; Jets; Magnetic fields; Polarization |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 04 Dec 2023 07:27 |
| Last Modified: | 04 Dec 2023 07:27 |
| URI: | http://eprints.um.edu.my/id/eprint/43869 |
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