It takes a supercluster to raise a galaxy

TL;DR

This paper investigates how large-scale environments like superclusters influence galaxy properties, revealing that supercluster morphology and density impact galaxy evolution beyond local factors.

Contribution

It demonstrates that large-scale structures significantly affect galaxy characteristics, highlighting the role of supercluster morphology and environment in galaxy evolution.

Findings

Galaxies in superclusters are more likely to be passive than those in voids.

Filament-type superclusters contain more red, passive galaxies than spider-type.

Large-scale environment influences galaxy evolution beyond local group effects.

Abstract

The properties of galaxies depend on their environment: red, passive elliptical galaxies are usually located in denser environments than blue, star-forming spiral galaxies. This difference in galaxy populations can be detected at all scales from groups of galaxies to superclusters. In this paper, we will discuss the effect of the large-scale environment on galaxies. Our results suggest that galaxies in superclusters are more likely to be passive than galaxies in voids even when they belong to groups with the same richness. In addition, the galaxies in superclusters are also affected by the morphology of the supercluster: filament-type superclusters contain relatively more red, passive galaxies than spider-type superclusters. These results suggest that the evolution of a galaxy is not determined by its local environment alone, but the large-scale environment also affects.