M31

M31

The galaxy M31 (NGC 0224), also known as the "Andromeda Galaxy", belongs to the Hubble class SA(s)b. Its disk is inclined by 74° - 78° with respect to the sky plane. This galaxy has a distance median value of 0.776 Mpc and hence is the nearest spiral galaxy on sky. The strongly polarized radio "ring" is a signature of a dynamo-generated magnetic field.

87.3 cm

M31 Total Intensity at 87.3 cm (343.4 MHz), WSRT, Resolution 230''×290'', Gießübel et al. 2013 Zoom Image
M31 Total Intensity at 87.3 cm (343.4 MHz), WSRT, Resolution 230''×290'', Gießübel et al. 2013
© MPIfR, Bonn

M31 87.3 cm 230" I

Gießübel et al. 2013

20.5 cm

Total Intensity at 20.5 cm (1.46 GHz), VLA D-array, Resolution 45'', Beck et al. 1998 Zoom Image
Total Intensity at 20.5 cm (1.46 GHz), VLA D-array, Resolution 45'', Beck et al. 1998
© MPIfR, Bonn
Polarized Intensity at 20.5 cm (1.46 GHz), VLA D-array, Resolution 45'', Beck et al. 1998 Zoom Image
Polarized Intensity at 20.5 cm (1.46 GHz), VLA D-array, Resolution 45'', Beck et al. 1998
© MPIfR, Bonn

M31 20.5 cm 45" I

M31 20.5 cm 45" PI

Beck et al. 1998
see also Berkhuijsen et al. 2003
see also Fletcher et al. 2004

11.1 cm

Total Intensity at 11.1 cm (2.70 GHz), Effelsberg, Resolution 5', Beck et al. 1982 Zoom Image
Total Intensity at 11.1 cm (2.70 GHz), Effelsberg, Resolution 5', Beck et al. 1982
© MPIfR, Bonn

M31 11.1 cm 5' I

Total Intensity at 11.1 cm (2.70 GHz), Effelsberg, Resolution 5', Beck et al. 1982. Many bright background sources that are not related to M31 have been subtracted. Zoom Image
Total Intensity at 11.1 cm (2.70 GHz), Effelsberg, Resolution 5', Beck et al. 1982. Many bright background sources that are not related to M31 have been subtracted. [less]
© MPIfR, Bonn
Polarized Intensity at 11.1 cm (2.70 GHz), Effelsberg, Resolution 5', Beck 1982. A few polarized background sources that are not related to M31 have been subtracted. Zoom Image
Polarized Intensity at 11.1 cm (2.70 GHz), Effelsberg, Resolution 5', Beck 1982. A few polarized background sources that are not related to M31 have been subtracted. [less]
© MPIfR, Bonn

M31 SS 11.1 cm 5' I

M31 SS 11.1 cm 5' PI

Beck et al. 1982
See also Beck 1982

6.2 cm

Total Intensity at 6.2 cm (4.85 GHz), Effelsberg, Resolution 3', Berkhuijsen et al. 2003 Zoom Image
Total Intensity at 6.2 cm (4.85 GHz), Effelsberg, Resolution 3', Berkhuijsen et al. 2003
© MPIfR, Bonn
Polarized Intensity at 6.2 cm (4.85 GHz), Effelsberg, Resolution 3', Berkhuijsen et al. 2003 Zoom Image
Polarized Intensity at 6.2 cm (4.85 GHz), Effelsberg, Resolution 3', Berkhuijsen et al. 2003
© MPIfR, Bonn

M31 6.2 cm 3' I

M31 6.2 cm 3' PI

Total Intensity at 6.2 cm (4.85 GHz), Effelsberg, Resolution 3', Berkhuijsen et al. 2003. Many bright background sources that are not related to M31 have been subtracted. Zoom Image
Total Intensity at 6.2 cm (4.85 GHz), Effelsberg, Resolution 3', Berkhuijsen et al. 2003. Many bright background sources that are not related to M31 have been subtracted. [less]
© MPIfR, Bonn
Polarized Intensity at 6.2 cm (4.85 GHz), Effelsberg, Resolution 3', Berkhuijsen et al. 2003. A few polarized background sources that are not related to M31 have been subtracted. Zoom Image
Polarized Intensity at 6.2 cm (4.85 GHz), Effelsberg, Resolution 3', Berkhuijsen et al. 2003. A few polarized background sources that are not related to M31 have been subtracted. [less]
© MPIfR, Bonn

M31 SS 6.2 cm 3' I

M31 SS 6.2 cm 3' PI

Berkhuijsen et al. 2003
see also Fletcher et al. 2004
Total Intensity (Central Region) at 6.2 cm (4.85 GHz), Combination of VLA and Effelsberg, Resolution 15'', Gießübel & Beck 2014 Zoom Image
Total Intensity (Central Region) at 6.2 cm (4.85 GHz), Combination of VLA and Effelsberg, Resolution 15'', Gießübel & Beck 2014
© MPIfR, Bonn
Polarized Intensity (Central Region) at 6.2 cm (4.85 GHz), Combination of VLA and Effelsberg, Resolution 15'', Gießübel & Beck 2014 Zoom Image
Polarized Intensity (Central Region) at 6.2 cm (4.85 GHz), Combination of VLA and Effelsberg, Resolution 15'', Gießübel & Beck 2014
© MPIfR, Bonn

M31 6.2 cm 15" I

M31 6.2 cm 15" PI

Gießübel & Beck 2014

3.6 cm

Total Intensity (Central Region) at 3.6 cm (8.35 GHz), Combination of VLA and Effelsberg, Resolution 15'', Gießübel & Beck 2014 Zoom Image
Total Intensity (Central Region) at 3.6 cm (8.35 GHz), Combination of VLA and Effelsberg, Resolution 15'', Gießübel & Beck 2014
© MPIfR, Bonn
Polarized Intensity (Central Region) at 3.6 cm (8.35 GHz), Combination of VLA and Effelsberg, Resolution 15'', Gießübel & Beck 2014 Zoom Image
Polarized Intensity (Central Region) at 3.6 cm (8.35 GHz), Combination of VLA and Effelsberg, Resolution 15'', Gießübel & Beck 2014
© MPIfR, Bonn

M31 3.6 cm 15" I

M31 3.6 cm 15" PI

Gießübel & Beck 2014