NGC 7421: Surfing the Intracluster Medium?

Publications of the Astronomical Society of Australia

Stuart D. Ryder¹ 

[1] G. Purcell

关键词: galaxies: individual (NGC 7421);    galaxies: kinematics and dynamics;    galaxies: intergalactic medium;    radio lines: galaxies;   

DOI  :  10.1071/AS97081

学科分类：天文学(综合)

来源: CSIRO

【 摘 要 】

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 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.

【 授权许可】

Unknown