Joanna Holt

Dominant Nuclear Outflow Driving Mechanisms in Powerful Radio Galaxies (2007)

Batcheldor, Dan, Tadhunter, Clive, Holt, Joanna, Morganti, Raffaella, O'Dea, Christopher P., Axon, David J., ...

In order to identify the dominant nuclear outflow mechanisms in Active Galactic Nuclei, we have undertaken deep, high resolution observations of two compact radio sources (PKS 1549-79 and PKS...

Fast neutral outflows in nearby radio galaxies: a major source of feedback (2007)

Morganti, Raffaella, Tadhunter, Clive, Oosterloo, Tom, Holt, Joanna, Emonts, Bjorn

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...

The giant star forming halo associated with the radio galaxy PKS1932-46 (2005)

Villar-Martin, Montse, Tadhunter, Clive, Morganti, Raffaella, Holt, Joanna

We report the discovery of a giant (~160 kpc) knotty extended emission line nebula associated with the radio galaxy PKS1932-46 at z=0.23. The 2-d long slit spectra, obtained with VLT-FORS2 at a large...