A Case for Renewed Activity in the Giant Radio Galaxy J0116-473

Details A Case for Renewed Activity in the Giant Radio Galaxy J0116-473 A Case for Renewed Activity in the Giant Radio Galaxy J0116-473

2002-09-27

arxiv.org/abs/astro-ph/0209570v1

Astrophys.J. 565 (2002) 256

Astronomy and Astrophysics

Astrophysics

25 pages, 10 figures, appeared in 2002 ApJ, 565, 256

Scientific paper

10.1086/324600

We present ATCA radio observations of the giant radio galaxy J0116-473 at 12 and 22 cm wavelengths in total intensity and polarization. The images clearly reveal a bright inner-double structure within more extended edge-brightened lobe emission. The lack of hotspots at the ends of the outer lobes, the strong core and the inner-double structure with its edge-brightened morphology lead us to suggest that this giant radio galaxy is undergoing a renewed nuclear activity: J0116-473 appears to be a striking example of a radio galaxy where a young double source is evolving within older lobe material. We also report the detection of a Mpc-long linear feature which is oriented perpendicular to the radio axis and has a high fractional polarization.

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