The large-scale radio structure of Fornax A

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Galactic Structure, Radio Galaxies, Astronomical Maps, Brightness Distribution, Collisions, Radio Emission

Scientific paper

The radio galaxy Fornax A (NGC 1316) has been mapped at 1.4 GHz with 50arcsec resolution using the Fleurs Synthesis Telescope. The lobes are relatively smooth but have a sharp outer boundary. The lobe to the east has a shell type structure. A bridge of emission has been found between the lobes but, unlike most other radio galaxies, this bridge is significantly displaced from the centre of NGC 1316. A scenario involving multiple galaxy collisions is discussed to try to explain the displaced bridge and the complicated dynamics of this object.

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