High resolution imaging of the radio continuum and neutral gas in the inner kiloparsec of the radio galaxy 3C293

Details High resolution imaging of the radio continuum and neutral gas in the inner kiloparsec of the radio galaxy 3C293 High resolution imaging of the radio continuum and neutral gas in the inner kiloparsec of the radio galaxy 3C293

2004-04-15

arxiv.org/abs/astro-ph/0404295v1

Mon.Not.Roy.Astron.Soc. 352 (2004) 49

Astronomy and Astrophysics

Astrophysics

14 pages, 8 figures, To be published in MNRAS. High resolution version is available at http://www.jb.man.ac.uk/~rbeswick/3c293

Scientific paper

10.1111/j.1365-2966.2004.07892.x

Using a combination of observations involving the VLA, MERLIN and global VLBI networks we have made a detailed study of the radio continuum and the neutral hydrogen (HI) kinematics and distribution within the central kiloparsec of the radio galaxy 3C293. These observations trace the complex jet structure and identify the position of the steeply inverted radio core at 1.3GHz. Strong HI absorption is detected against the majority of the inner kiloparsec of 3C293. This absorption is separated into two dynamically different and spatially resolved systems. Against the eastern part of the inner radio jet narrow HI absorption is detected and shown to have higher optical depths in areas co-spatial with a central dust lane. Against the western jet emission and core component, broad and complex HI absorption is detected. This broad and complex absorption structure is discussed in terms of two possible interpretations for the gas kinematics observed: that the gas is situated in two gas layers or that it is in a sub-kiloparsec disk rotating about the core. (Abridged)

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