The REXCESS cluster sample in radio wavelength

Abstract

Galaxy clusters are the largest gravitationally bound structures in the universe. Their examination provides valuable information about how the universe evolved and still evolves today.
It is important to gain greater understanding in the relation between x-ray and radio observations in order to get a deeper comprehension of the astrophysical processes underlying the observed results. The REXCESS sample is constructed in a way to make it representative for the local universe, so conclusions drawn from it can be easily extrapolated to the local cluster population as a whole. The lack of radio data for this important sample is closed with this work. It covers the medium-low part of the radio spectrum and supports the hypothesis that clusters with a bright central galaxy are more likely to have a central radio source associated with it. It additionally finds that bright x-ray sources does not always have radio counterparts, at least not at this frequency range.
These results impact the highly active research field of galaxy clusters by implying that radio observations play a valuable part in any multi-wavelength observation of galaxy clusters. There are certainly a lot more research needed to confirm the findings of this thesis and in order to extend the knowledge to even lower frequencies.

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