Fig. 3.

Apparent magnetic field orientations (not corrected for Faraday rotation) of M 31 at λ11.3 cm at 5′ HPBW with lengths proportional to polarized intensity PI, overlaid onto an image of 250 μm infrared emission from Fritz et al. (2012) (arbitrary units, in log10 scale), smoothed to 2′ HPBW, indicated in the bottom left corner. The coordinate system is rotated by −53°.
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