NGC 7421 is a barred spiral that is displaced from the centre of its optical envelope, and has a 'bow-shock'-like western boundary, both suggestive of interaction with an intracluster medium. We have used five configurations of the ATCA to map the distribution and kinematics of H I in NGC7421, and find supportive evidence for this scenario in the form of an H I 'wake'. When compared with ROSAT PSPC observations of the diffuse hot gas in the surrounding group of galaxies, these new ATCA results will allow us to place new constraints on the density and dynamics of the intracluster medium.
|Number of pages||4|
|Journal||Publications of the Astronomical Society of Australia|
|Publication status||Published - 1 Jan 1997|
- Galaxies: individual (NGC 7421)
- Galaxies: intergalactic medium
- Galaxies: kinematics and dynamics
- Radio lines: galaxies