The Intra-cluster Medium Influence on Spiral Galaxies

Details The Intra-cluster Medium Influence on Spiral Galaxies The Intra-cluster Medium Influence on Spiral Galaxies

1999-03-31

arxiv.org/abs/astro-ph/9903482v1

Astronomy and Astrophysics

Astrophysics

7 pages, 2 postscript figures, LateX A&A, accepted in A&A

Scientific paper

We made a detailed analysis of the sample of 39 cluster spiral galaxies of various types observed at H$\alpha$ wavelength by Amram et al. (1992 to 1996), with a scanning Fabry-Perot. We plotted the outer gradient of their rotation curves as a function of the deprojected cluster-centric distance. The rotation curves of late type galaxies markedly rise far from the cluster center. This suggests evolutionary effects, since early types show no special trend. We suggest that the evolution process within a cluster leads late type galaxies to exhibit flatter curves when they get closer to the center, on their way to evolving into early type galaxies.

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