Probing Magnetic Fields In and Around Galaxies Near and Far
Abstract
In order to understand the magnetization of galaxies and the role of magnetic fields in feedback processes that govern star formation and galaxy evolution, it is essential to have a comprehensive census of magnetic fields in and around galaxies from the nearby Universe to high redshifts. In this chapter, we outline the science goals, strategies, techniques, and observational requirements with SKA AA4 for (1) a homogeneous polarimetric survey of nearby galaxies - mapping both the diffuse polarized emission as well as producing a dense RM grid within the virial radius; (2) a survey of the interstellar magnetic fields in distant galaxies targeting strong lensing systems with polarized lensed quasars, as well as a general statistical back-illumination survey to probe the redshift evolution of magnetic fields in the CGM. These proposed observations will serve as a major step towards understanding the co-evolution of galaxies and their magnetic fields over cosmic time and provide constraints on galactic dynamo theories.
Keywords
Cite
@article{arxiv.2606.30025,
title = {Probing Magnetic Fields In and Around Galaxies Near and Far},
author = {S. A. Mao and Rainer Beck and Aritra Basu and Lerato Baidoo and Andrea Bracco and Ralf-Jürgen Dettmar and Volker Hessen and Cathy Horellou and Timea O. Kovacs and Kohei Kurahara and Yu-Qing Lou and Yik Ki Ma and Rikuto Omae and Rosita Paladino and Amit Seta and Fatemeh Tabatabaei and Theresa Wiegert},
journal= {arXiv preprint arXiv:2606.30025},
year = {2026}
}
Comments
Published in Advancing Astrophysics with the SKA II (AASKAII), 2026 (arXiv:2606.20366). Report-no:AASKAII/Mao01