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arxiv: astro-ph/0701440 · v1 · submitted 2007-01-15 · 🌌 astro-ph

Fast neutral outflows in nearby radio galaxies: a major source of feedback

Raffaella Morganti (1 , 2) , Clive Tadhunter (3) , Tom Oosterloo (1 , Joanna Holt (3) , Bjorn Emonts (4) ((1) ASTRON , Dwingeloo , NL (2) Kapteyn Astronomical Inst.
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Groningen NL (3) Univ. of Sheffield UK (4) Columbia Univ. New York USA)
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keywords outflowsradiofastgalaxiesneutralabsorptioncasescomparable
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Fast (~1000 km/s) outflows of neutral gas (from 21-cm HI absorption) are detected in strong radio sources. The outflows occur, at least in some cases, at distances from the radio core that range between few hundred parsecs and kpc. These HI outflows likely originate from the interaction between radio jets and the dense surrounding medium. The estimated mass outflow rates are comparable to those of moderate starburst-driven superwinds. The impact on the evolution of the host galaxies is discussed.

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