Ricci, Federica, Lovisari, Lorenzo, Kraft, R. P., Massaro, F., Paggi, A., Liuzzo, E., Tremblay, Grant R., Forman, William R., Baum, S., O'Dea, C., and Wilkes, Belinda J. 2018. "Stormy Weather in 3C 196.1: Nuclear Outbursts and Merger Events Shape the Environment of the Hybrid Radio Galaxy 3C 196.1." The Astrophysical Journal 867:35. https://doi.org/10.3847/1538-4357/aae487
We present a multiwavelength analysis based on archival radio, optical, and X-ray data of the complex radio source 3C 196.1, whose host is the brightest cluster galaxy of a z = 0.198 cluster. HST data show Hα [N II] emission aligned with the jet 8.4 GHz radio emission. An Hα [N II] filament coincides with the brightest X-ray emission, the northern hotspot. Analysis of the X-ray and radio images reveals cavities located at galactic and cluster scales. The galactic-scale cavity is almost devoid of 8.4 GHz radio emission and the southwestern Hα [N II] emission is bounded (in projection) by this cavity. The outer cavity is cospatial with the peak of 147 MHz radio emission, and hence we interpret this depression in X-ray surface brightness as being caused by a buoyantly rising bubble originating from an active galactic nuclei outburst ∼280 Myr ago. A Chandra snapshot observation allowed us to constrain the physical parameters of the cluster, which has a cool core with a low central temperature ∼2.8 keV, low central entropy index ∼13 keV cm2 and a short cooling time of ∼500 Myr, which is and a short cooling time of ∼500 Myr, which is cav and jet powers P jet associated with the cavities: E cav ∼ 7 × 1058 erg, P jet ∼ 1.9 × 1044 erg s‑1 for the inner cavity and E cav ∼ 3 × 1060 erg, P jet ∼ 3.4 × 1044 erg s‑1 for the outer cavity.