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Radio jet interactions in the radio galaxy PKS 2152–699 |
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| Authors: | R A E Fosbury R Morganti W Wilson R D Ekers S di Serego Alighieri & C N Tadhunter |
| Institution: | Space Telescope–European Coordinating Facility, D-85748 Garching bei München, Germany,;CSIRO, Australia Telescope National Facility, PO Box 76, Epping, NSW 2121, Australia,;Istituto di Radioastronomia, CNR, via Gobetti 101, 40129 Bologna, Italy,;Osservatorio Astrofisico di Arcetri, largo E. Fermi 5, I-50125, Firenze, Italy,;Department of Physics, University of Sheffield, Sheffield S3 7RH |
| Abstract: | We present radio observations of the radio galaxy PKS 2152–699 obtained with the Australia Telescope Compact Array. The much higher resolution and signal-to-noise ratio of the new radio maps reveal the presence of a bright radio component about 10 arcsec north-east of the nucleus. This lies close to the highly ionized cloud previously studied in the optical and here shown in a broad-band red snapshot image with the HST PC 2. It suggests that PKS 2152–699 may be a jet/cloud interaction similar to 3C 277.3. This could cause the change in the position angle (of ～ 20°) of the radio emission from the inner to the outer regions. On the large scale, the source has Fanaroff & Riley type II morphology although the presence of the two hotspots in the centres of the lobes is unusual. The northern lobe shows a particularly relaxed structure while the southern one has an edge-brightened, arc-like structure. |
| Keywords: | galaxies: active galaxies: individual: PKS 2152–699 galaxies: interactions galaxies: jets radio continuum: galaxies |