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Publications of the Astronomical Society of Australia Publications of the Astronomical Society of Australia Society
Publications of the Astronomical Society of Australia
RESEARCH ARTICLE

NGC 7421: Surfing the intracluster medium?

SD Ryder, V Anderson, D Davis and G Purcell

Publications of the Astronomical Society of Australia 14(1) 81 - 84
Published: 1997

Abstract

NGC 7421 is a barred spiral displaced from the centre of its optical envelope, with 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 HI in NGC 7421, and find supportive evidence for this scenario in the form of an HI '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.

https://doi.org/10.1071/AS97081

© ASA 1997

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