Interaction of the radio source PKS 0427-53 with IC 2082 and the cluster medium

Astronomy and Astrophysics – Astronomy

Scientific paper

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Galactic Clusters, Radio Sources (Astronomy), Astronomical Photography, Astronomical Spectroscopy, Flux Density, Magnetic Fields, Position (Location)

Scientific paper

Radio emission from the source 0427-53 surrounds the 13.9-mag galaxy IC 2082, a giant cD with a double nucleus in a cluster of more than 80 members. Radio images at 843 MHz and 1415 MHz show a double head and complex tail structure. The authors identify the radio emission with the fainter optical nucleus which is probably a second galaxy in a transient encounter with the cD galaxy. The radio tail to the west is closely confined in a ridge that bends sharply south 5 arcmin (160 kpc) from the head. The authors suggest that in the dark cluster medium which surrounds IC 2082 there is tangential drag from ordered flow.

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