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Mahony, E K; Oonk, J BR; Morganti, R; Tadhunter, C; Bessiere, P; Short, P; Emonts, B HC; Oosterloo, T A
Monthly notices of the Royal Astronomical Society, 01/2016, Letnik: 455, Številka: 3Journal Article
Fast outflows of gas, driven by the interaction between the radio jets and interstellar medium (ISM) of the host galaxy, are being observed in an increasing number of galaxies. One such example is the nearby radio galaxy 3C 293. In this paper we present integral field unit observations taken with OASIS on the William Herschel Telescope, enabling us to map the spatial extent of the ionized gas outflows across the central regions of the galaxy. The jet-driven outflow in 3C 293 is detected along the inner radio lobes with a mass outflow rate ranging from ~0.05 to 0.17 M... yr... (in ionized gas) and corresponding kinetic power of ~0.5-3.5 x 1040 erg s... Investigating the kinematics of the gas surrounding the radio jets (i.e. not directly associated with the outflow), we find linewidths broader than 300 km s... up to 5 kpc in the radial direction from the nucleus (corresponding to 3.5 kpc in the direction perpendicular to the radio axis at maximum extent). Along the axis of the radio jet linewidths >400 km s... are detected out to 7 kpc from the nucleus and linewidths of >500 km s... at a distance of 12 kpc from the nucleus, indicating that the disturbed kinematics clearly extend well beyond the high surface brightness radio structures of the jets. This is suggestive of the cocoon structure seen in simulations of jet-ISM interaction and implies that the radio jets are capable of disturbing the gas throughout the central regions of the host galaxy in all directions. (ProQuest: ... denotes formulae/symbols omitted.)
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