The Role of Groups in Galaxy Evolution: compelling evidence of pre-processing out to the turnaround radius of clusters

Abstract

We present clear and direct evidence of the pre-processing effect of group galaxies falling into clusters in the local Universe ($z\lesssim 0.1$). We start with a sample of 238 clusters, from which we select 153 with N${}_{200}\ge$ 20. We considered 1641 groups within the turnaround radius ($\sim$ 5$\times$R${}_{200}$) of these 153 clusters. There are 6654 {\it individual cluster galaxies} and 4133 {\it group galaxies} within this radius. We considered two control samples of galaxies, in isolated groups and in the field. The first comprises 2601 galaxies within 1606 {\it isolated groups}, and the latter has 4273 field objects. The fraction of star forming galaxies in infalling groups has a distinct clustercentric behavior in comparison to the remaining cluster galaxies. Even at $5\times$R${}_{200}$ the {\it group galaxies} already show a reduced fraction of star forming objects. At this radius, the results for the {\it individual cluster galaxies} is actually compatible to the field. That is strong evidence that the group environment is effective to quench the star formation prior to the cluster arrival. The group star forming fraction remains roughly constant inwards, decreasing significantly only within the cluster R${}_{200}$ radius. We have also found that the pre-processing effect depends on the group mass (indicated by the number of members). The effect is larger for more massive groups. However, it is significant even for pairs an triplets. Finally, we find evidence that the time scale required for morphological transformation is larger than the one for quenching.

7 pages, 4 figures, Accepted for publication as a Letter to the MNRAS

References in corpus (21)

• The DEEP2 Galaxy Redshift Survey: The Relationship Between Galaxy Properties and Environment at z ~ 1
• The relation between velocity dispersion and mass in simulated clusters of galaxies: dependence on the tracer and the baryonic physics
• CIRS: Cluster Infall Regions in the Sloan Digital Sky Survey I. Infall Patterns and Mass Profiles
• LoCuSS: The slow quenching of star formation in cluster galaxies and the need for pre-processing
• The VIMOS VLT Deep Survey: The build-up of the colour-density relation
• Witnessing galaxy preprocessing in the local Universe: the case of a star-bursting group falling into Abell 1367
• Disruption of satellite galaxies in simulated groups and clusters: the roles of accretion time, baryons, and pre-processing
• LoCuSS: Pre-processing in galaxy groups falling into massive galaxy clusters at z=0.2
• The pre-processing of subhaloes in SDSS groups and clusters
• NoSOCS in SDSS. I. Sample Definition and Comparison of Mass Estimates
• Evidence of pre-processing and a dependence on dynamical state for low-mass satellite galaxies
• The Northern Sky Optical Cluster Survey III: A Cluster Catalog Covering Pi Steradians
• Multiscale cosmic web detachments, connectivity, and preprocessing in the supercluster SClA2142 cocoon
• X-ray Galaxy Clusters in NoSOCS: Substructure and the Correlation of Optical and X-ray Properties
• SPIDERS: An Overview of The Largest Catalogue of Spectroscopically Confirmed X-ray Galaxy Clusters
• Biases in galaxy cluster velocity dispersion and mass estimates in the small number of galaxies regime
• The Three Hundred project: Galaxy groups do not survive cluster infall
• Leavers and remainers: Galaxies split by group-exit
• Forecasting the success of the WEAVE Wide-Field Cluster Survey on the extraction of the cosmic web filaments around galaxy clusters
• Examining transitional galaxies to understand the role of clusters and their dynamical status in galaxy quenching
• VST-GAME: Galaxy Assembly as a function of Mass and Environment with VST. Photometric assessment and density field of MACSJ0416

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