Large Scale Structures at High Redshift in the GOODS Field

TL;DR

This paper catalogs high-density galaxy structures at redshifts up to 2.5 in the GOODS-South field, analyzing their properties, evolution, and environmental effects on galaxy characteristics.

Contribution

It provides a detailed catalog of high-redshift overdensities and investigates their galaxy populations and environmental dependencies, highlighting evolutionary trends.

Findings

High-density peaks are embedded in large structures up to z ~ 2.5.

Color-magnitude relation slope shows no significant evolution with redshift.

Galaxy mass and segregation effects vary with environment and redshift.

Abstract

We present a catalogue of overdensities in the GOODS-South field. We find various high density peaks that are embedded in structures diffused on the entire field, up to z ~ 2.5. The slope of their colour-magnitude relation does not show significative evolution with z. We find evidence that galaxies forming these structures are more massive than galaxies located in low density regions. We also analyse the variation of galaxy properties with the associated environmental density and we find that the segregation of red galaxies with density is stronger at low redshift and at high luminosities while it gets much weaker for increasing z.