VIVA, the VLA Imaging of Virgo in Atomic Gas

Aeree Chung

Virgo, as a nearby richest galaxy cluster, is an ideal laboratory to study great details of environmental effects on galaxy evolution. In this talk, I present the result of our new high resolution HI imaging survey of 53 Virgo galaxies which have been selected in a range of density regions. I describe the HI gas morphologies of galaxies undergoing different types of interactions (e.g. ICM-ISM or galaxy-galaxy) to discuss how far out galaxies feel the impact of the cluster by which effect(s). I also present results from our recent work in progress: broad band color study of the VIVA sample, to argue how gas stripping due to the cluster environment helps galaxies change their color and migrate from the blue to the red sequence.