Scientific Seminars

LoCuSS: Galaxy properties in and around massive clusters at z=0.2

Matteo Bianconi
University of Birmingham

2018-05-22    14:00    Brera - Cupola Fiore

Galaxy cluster evolution is driven by accretion, in the form of both baryonic and non-baryonic matter, of smooth continuous streams of small haloes, together with episodic merging of more massive systems. Given that clusters double their mass below z∼0.5, the LoCuSS survey provides the ideal dataset to study how accretion shapes cluster and their galaxy members. In particular, LoCuSS clusters have excellent data coverage in both wavelength and area, the latter of which includes infalling regions. In this talk, I will present direct evidences of pre-processing in a population of newly discovered infalling groups, caught at their first encounter with the cluster environment. The fraction of star-forming galaxies in groups is compatible with cluster cores, suggesting that groups populate clusters with passive galaxies. Additionally, I will show a new study targeting dust consumption in cluster galaxies, contributing to star formation quenching.