Supermassive black holes are thought to be ubiquitous in bulge-dominated galaxies and the standard model of Active Galactic Nuclei (AGN) invokes the release of gravitational energy due to accretion of material onto a central black hole. What determines the presence and degree of nuclear activity, however, remains an unanswered question. Unlike quasar activity, which seems to coincide with the build-up of galactic-size structures, activity in nearby AGN with well-established host galaxies, must involve re-activation of their central black holes. Neutral hydrogen (HI) is a key tracer of galactic structure and dynamics and responds most readily to perturbations caused by tidal disturbance and non-axisymetric gravitational potentials - perturbations which have been mooted as possible triggers of nuclear activity. I present here an HI imaging study of a heterogeneous sample of nine nearby Seyfert galaxies and describe plans for a new HI survey which aims to investigate the role of the host gas in triggering and fuelling of nuclear activity on a statistical basis.
|Title of host publication||Active Galactic Nuclei: from Central Engine to Host Galaxy, 2002|
|Editors||S. Collin, F. Combes, I. Shlosman|
|Publisher||Astronomical Society of the Pacific|
|Publication status||Published - 31 Dec 2003|
|Event||Active Galactic Nuclei: from Central Engine to Host Galaxy, 2002 - Meudon, France|
Duration: 23 Jul 2002 → 27 Jul 2002
|Name||Astronomical Society of the Pacific Conference Series|
|Other||Active Galactic Nuclei: from Central Engine to Host Galaxy, 2002|
|Period||23/07/02 → 27/07/02|
Beswick, R. J., Pedlar, A., Mundell, C. G., Gallimore, J. F., Peck, A. B., Taylor, G. B., & Holloway, A. J. (2003). Neutral Hydrogen Absorption against the Radio Galaxy 3C 293 and the LIRG NGC 6240. In S. Collin, F. Combes, & I. Shlosman (Eds.), Active Galactic Nuclei: from Central Engine to Host Galaxy, 2002 (pp. 481). (Astronomical Society of the Pacific Conference Series; Vol. 290). Astronomical Society of the Pacific.