The magnetic field structure of the central region in M31

Understand

The Andromeda Galaxy (M31) is the nearest grand-design spiral galaxy.

• Thus far most studies in the radio regime concentrated on the 10 kpc ring.
• The central region of M31 has significantly different properties than the outer parts: The star formation rate is low, and inclination and position angle are largely different from the outer disk.
• The existing model of the magnetic field in the radial range 6<=r<=14 kpc is extended to the innermost part r<=0.5 kpc to ultimately achieve a picture of the entire magnetic field in M31.