University of Birmingham > Talks@bham > Astrophysics Seminars > Galaxy evolution within growing massive clusters

Galaxy evolution within growing massive clusters

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If you have a question about this talk, please contact Sean McGee.

I present highlights from our long-running study of star formation activity among galaxies in and around 30 massive clusters at z~0.2, combining Spitzer mid-infrared and GALEX NUV imaging from the Local Cluster Substructure Survey (LoCuSS) with extensive spectroscopy from the Arizona Cluster Redshift Survey (ACReS) including >10,000 confirmed cluster members. I develop a dynamical cosmological framework to show how galaxies and galaxy groups are being accreted onto clusters at late times, and use it to show that our observational results require that most (if not all) massive star-forming galaxies accreted onto clusters must have their star formation activity slowly quenched on 1-2 Gyr time-scales. I also present our XMM survey of X-ray groups in the vicinity of the same massive clusters, revealing how clusters are assembling their mass at late times via the accretion of group-mass systems.

This talk is part of the Astrophysics Seminars series.

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