NGC 7421: surfing the intracluster medium?

Stuart D. Ryder*, G. Purcell, D. Davis, V. Andersen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)81-84
Number of pages4
JournalPublications of the Astronomical Society of Australia
Issue number1
Publication statusPublished - 1 Jan 1997
Externally publishedYes


  • Galaxies: individual (NGC 7421)
  • Galaxies: intergalactic medium
  • Galaxies: kinematics and dynamics
  • Radio lines: galaxies


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