The assumption of Hydrostatic equilibrium (HE) is often used in observations to estimate galaxy clusters masses. We use a set of almost 300 simulated clusters from THE THREE HUNDRED Project, to estimate the cluster HE mass and the bias deriving from it. We study the dependence of the bias on several dynamical state indicators across a redshift range from 0.07 to 1.3, finding no dependence between them. Moreover, we focus our attention on the evolution of the HE bias during the merger phase, where the bias even reaches negative values due to an overestimation of the mass with HE.
The hydrostatic mass bias in THE THREE HUNDRED clusters / Gianfagna, Giulia; Rasia, Elena; Cui, Weiguang; DE PETRIS, Marco; Gustavo Yepes, And. - In: EPJ WEB OF CONFERENCES. - ISSN 2101-6275. - 257:(2022). (Intervento presentato al convegno mm Universe @ NIKA2 - Observing the mm Universe with the NIKA2 camera tenutosi a Rome) [10.1051/epjconf/202225700020].
The hydrostatic mass bias in THE THREE HUNDRED clusters
Giulia Gianfagna;Marco De Petris;
2022
Abstract
The assumption of Hydrostatic equilibrium (HE) is often used in observations to estimate galaxy clusters masses. We use a set of almost 300 simulated clusters from THE THREE HUNDRED Project, to estimate the cluster HE mass and the bias deriving from it. We study the dependence of the bias on several dynamical state indicators across a redshift range from 0.07 to 1.3, finding no dependence between them. Moreover, we focus our attention on the evolution of the HE bias during the merger phase, where the bias even reaches negative values due to an overestimation of the mass with HE.File | Dimensione | Formato | |
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Gianfagna_The hydrostatic mass bias_2021.pdf
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Note: https://www.epj-conferences.org/articles/epjconf/abs/2022/01/epjconf_mmUniverse2021_00020/epjconf_mmUniverse2021_00020.html
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