NGC 7421: Surfing the intracluster medium?

Details NGC 7421: Surfing the intracluster medium? NGC 7421: Surfing the intracluster medium?

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pasa...14...81r&link_type=abstract

Publications Astronomical Society of Australia, vol. 14, no. 1, p. 81-84

Astronomy and Astrophysics

Astronomy

10

Galaxies, Individual (Ngc 7421), Kinematics & Dynamics, Intergalactic Medium, Radio Lines

Scientific paper

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.

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