Stellar populations in superclusters of galaxies

Abstract

A catalogue of superclusters of galaxies is used to investigate the influence of the supercluster environment on galaxy populations, considering galaxies brighter than M${}_r<$-21+5$\log$ h. Empirical spectral synthesis techniques are applied to obtain the stellar population properties of galaxies which belong to superclusters and representative values of stellar population parameters are attributed to each supercluster. We show that richer superclusters present denser environments and older stellar populations. The galaxy populations of superclusters classified as filaments and pancakes are statistically similar, indicating that the morphology of superclusters does not have a significative influence on the stellar populations. Clusters of galaxies within superclusters are also examined in order to evaluate the influence of the supercluster environment on their galaxy properties. Our results suggest that the environment affects galaxy properties but its influence should operate on scales of groups and clusters, more than on the scale of superclusters.

7 pages, 4 figures; accepted to MNRAS

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Cited by in corpus (9)

• SDSS superclusters: morphology and galaxy content
• A probabilistic approach to emission-line galaxy classification
• Effects of superstructure environment on galaxy groups
• Infalling groups and galaxy transformations in the cluster A2142
• Star Formation and Supercluster Environment of 107 Nearby Galaxy Clusters
• The XXL Survey: XXX. Characterisation of the XLSSsC N01 supercluster and analysis of the galaxy stellar populations
• The galaxy environment in GAMA G3C groups using the Kilo Degree Survey Data Release 3
• Galaxy Superclusters and Their Complexes in the Cosmic Web
• Multimodality of rich clusters from the SDSS DR8 within the supercluster-void network (talk at MG13 meeting)