Abstract
We present 13 cm polarization observations of nearby spiral galaxy NGC
6946. These data provide a new perspective into the magnetic field
structure of this galaxy. Previous observations show strong
depolarization between 6 cm and 22 cm, and we show that the morphology
of the 13 cm polarization bridges this gap. We combine all available
high resolution polarization observations to fit models of the line of
sight magnetic field structure across the disk. We find simple screens
of Faraday rotation, differential Faraday rotation, and internal Faraday
dispersion are insufficient to explain the observed depolarization, and
present the results of the best fit models. We discuss how future
broadband observations and improved models will help reconstruct the
full 3D model of the magnetic field structure in the disks and haloes of
galaxies.
| Original language | English |
|---|---|
| Journal | American Astronomical Society Meeting |
| Volume | 229 |
| Publication status | Published - Jan-2017 |