The Evolution of Galaxies in and around Clusters at High-Redshift

Details The Evolution of Galaxies in and around Clusters at High-Redshift The Evolution of Galaxies in and around Clusters at High-Redshift

2004-06-29

arxiv.org/abs/astro-ph/0406637v2

Astronomy and Astrophysics

Astrophysics

Changes made to match the version to be published in PASJ

Scientific paper

In this paper, we focus on ram-pressure stripping and evaporation of disk galaxies in and around a cluster. We show that the evolution of the disk surface density affects the efficiency of ram-pressure stripping of galaxies at z>~1. We also consider the saturation of thermal conduction in detail and show that it cannot be ignored at larger radii of a cluster, which makes the time-scale of the evaporation larger. Both the ram-pressure stripping and evaporation could affect the evolution of galaxies even around a cluster. In particular, the observed gradual decline of the star-formation rates of galaxies in and around clusters could be explained by evaporation without resorting to speculative strangulation (stripping of warm gas in galactic halos).

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