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It takes a supercluster to raise a galaxy

Published online by Cambridge University Press:  12 October 2016

Heidi Lietzen
Affiliation:
Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain Universidad de La Laguna, Dept. Astrofísica, E-38206 La Laguna, Tenerife, Spain email: [email protected]
Maret Einasto
Affiliation:
Tartu Observatory, 61602 Tõravere, Estonia
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Abstract

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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.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2016 

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