Cosmologia com aglomerados de gal\'axias

TL;DR

Galaxy clusters are vital for cosmology, but uncertainties in mass estimation and systematic errors hinder precise parameter constraints, necessitating improved modeling and analysis methods for future large surveys.

Contribution

This work reviews galaxy cluster abundance and discusses sources of uncertainty, emphasizing the need for accurate mass-observable relations and systematic error reduction.

Findings

Identified key sources of uncertainty in cluster abundance studies.

Highlighted the importance of precise mass-observable modeling.

Discussed future survey data challenges and solutions.

Abstract

Galaxy clusters are important cosmological probes since their abundance and spatial distribution are directly linked to structure formation on large scales. The principal uncertainty source on the cosmological parameter constraints concerns the cluster mass estimation from mass proxies. In addition, future surveys will provide a large amount of data, requiring an improvement in the accuracy of other elements used in the construction of cluster likelihoods. Therefore, accurate modeling of the mass-observable relations and reducing the effect of different systematic errors are fundamental steps for the success of cluster cosmology. In this work, we briefly review the abundance of galaxy clusters and discuss many sources of uncertainty. Os aglomerados de gal\'axias s\~ao importantes sondas cosmol\'ogicas, j\'a que a abund\^ancia e a distribui\c{c}\~ao espacial desses objetos est\~ao diretamente ligadas \`a forma\c{c}\~ao de estruturas em grandes escalas. A maior fonte de incerteza nas restri\c{c}\~oes de par\^ametros cosmol\'ogicos \'e origin\'aria das estimativas das massas dos aglomerados a partir da rela\c{c}\~ao massa-observ\'avel. Al\'em disso, os pr\'oximos grandes levantamentos fornecer\~ao uma grande quantidade de dados, requerendo uma melhoria na precis\~ao de outros elementos utilizados na constru\c{c}\~ao das verossimilhan\c{c}as de aglomerados. Portanto, uma modelagem precisa da rela\c{c}\~ao massa-observ\'avel e diminuir o efeito dos diferentes erros sistem\'aticos s\~ao passos fundamentais para o sucesso da cosmologia com aglomerados. Neste trabalho, fazemos uma breve revis\~ao da abund\^ancia de aglomerados de gal\'axias, e discuss\~ao de diferentes fontes de incerteza.