# CHANG-ES: XVIII---The CHANG-ES Survey and Selected Results

## TL;DR

The CHANG-ES survey of 35 nearby edge-on galaxies provides detailed radio continuum and polarization data, revealing new insights into magnetic fields, AGN activity, and galaxy halo structures.

## Contribution

This paper presents the first large-scale survey of edge-on galaxies with full polarization data, uncovering novel magnetic and structural features.

## Key findings

- Detection of circular polarization and variability in AGNs
- Observation of disk-halo structures in polarization
- Identification of broad-scale halos with reversing magnetic fields

## Abstract

The CHANG-ES (Continuum Halos in Nearby Galaxies) survey of 35 nearby edge-on galaxies is revealing new and sometimes unexpected and startling results in their radio continuum emission. The observations were in wide bandwidths centered at 1.6 and 6.0 GHz. Unique to this survey is full polarization data showing magnetic field structures in unprecedented detail, resolution and sensitivity for such a large sample. A wide range of new results are reported here, some never before seen in any galaxy. We see circular polarization and variability in active galactic nuclei (AGNs), in-disk discrete features, disk-halo structures sometimes only seen in polarization, and broad-scale halos with reversing magnetic fields, among others. This paper summarizes some of the CHANG-ES results seen thus far. Released images can be found at https://www.queensu.ca/changes.