The large-scale structure in the Chandra Deep Field South

TL;DR

This paper investigates the large-scale matter distribution in the Chandra Deep Field South, identifying over-densities and analyzing their X-ray properties to understand high-redshift galaxy clusters.

Contribution

It provides the first detailed analysis of large-scale structures in this field using deep X-ray observations and photometric redshifts, including measurements of gas temperature and luminosity.

Findings

Identified several over-densities between redshift 0.6 and 2.3.

Set a faint upper limit on X-ray luminosity at redshift 1.6.

Detected extended X-ray emission at redshift 0.96 with estimated gas temperature.

Abstract

We have studied the large scale distribution of matter in the Chandra Deep Field South on the basis of photometric redshifts and we have identifed several over-densities between redshift 0.6 and 2.3. We analyse two of these structures using the deepest X-ray observations ever obtained: 4 Ms with the Chandra satellite and 2.5 Ms with XMM-Newton. We set a very faint upper limit on the X-ray luminosity of a structure at redshift 1.6, and we find an extended X-ray emission from a structure at redshift 0.96 of which we can estimate the gas temperature and make a comparison with the scaling relations between the X-ray luminosity and mass or temperature of high redshift galaxy clusters.