{"id":4470,"date":"2024-09-08T18:53:43","date_gmt":"2024-09-08T16:53:43","guid":{"rendered":"https:\/\/www.oa-cagliari.inaf.it\/seminari\/a-bayesian-hierarchical-model-for-estimating-the-heterogeneity-of-pressure-profiles-within-a-population-of-galaxy-clusters\/"},"modified":"2024-09-08T18:53:43","modified_gmt":"2024-09-08T16:53:43","slug":"a-bayesian-hierarchical-model-for-estimating-the-heterogeneity-of-pressure-profiles-within-a-population-of-galaxy-clusters","status":"publish","type":"seminari","link":"https:\/\/www.oa-cagliari.inaf.it\/en\/seminars\/a-bayesian-hierarchical-model-for-estimating-the-heterogeneity-of-pressure-profiles-within-a-population-of-galaxy-clusters\/","title":{"rendered":"A Bayesian Hierarchical Model for estimating the heterogeneity of pressure profiles within a population of galaxy clusters"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1852\" src=\"https:\/\/www.oa-cagliari.inaf.it\/wp-content\/uploads\/2025\/09\/A-Bayesian-Hierarchical-Model-for-estimating-the-heterogeneity-of-pressure-profiles-within-a-population-of-galaxy-clusters.png\" alt=\"A Bayesian Hierarchical Model for estimating the heterogeneity of pressure profiles within a population of galaxy clusters\" width=\"500\" height=\"485\" srcset=\"https:\/\/www.oa-cagliari.inaf.it\/wp-content\/uploads\/2025\/09\/A-Bayesian-Hierarchical-Model-for-estimating-the-heterogeneity-of-pressure-profiles-within-a-population-of-galaxy-clusters.png 500w, https:\/\/www.oa-cagliari.inaf.it\/wp-content\/uploads\/2025\/09\/A-Bayesian-Hierarchical-Model-for-estimating-the-heterogeneity-of-pressure-profiles-within-a-population-of-galaxy-clusters-300x291.png 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>The study of the thermodynamic properties of galaxy clusters is crucial to probing the evolution of the universe at the largest scales. In this talk, I will present a Bayesian Hierarchical Model tailored to determining the average pressure profile and the corresponding intrinsic scatter for a population of galaxy clusters. Such analysis adequately encapsulates the global properties of the overall distribution of clusters and each cluster&#8217;s specific, individual aspects. Taking into account the heterogeneity of the pressure profile across different galaxy clusters within a population is not straightforward and, especially, is highly computationally expensive, since it requires a combined estimate of the objects all at the same time, in a single-stage procedure. I will give an overview of the advantages and challenges of such methodology, with a particular focus on its great potential of exploiting the massive amounts of observations gathered by the current and forthcoming surveys that characterize the Big Data era in astrophysics.    <\/p>\n<p>&nbsp;<\/p>\n<p>Brief CV of Dr. Fabio Castagna:<\/p>\n<p>He is currently a postdoc researcher at INAF-Osservatorio Astronomico di Brera, focused on characterizing the thermodynamic properties of galaxy clusters through SZ and X-ray observations. After graduating in Biostatistics from Bocconi University in Milan in 2018, he began collaborating with INAF-Brera on the applications of Bayesian statistics to astrophysics. In 2024, he obtained his PhD in Computer Science and Mathematics of Computation from the University of Insubria. <\/p>\n","protected":false},"template":"","class_list":["post-4470","seminari","type-seminari","status-publish","hentry","categorie_seminari-colloquium"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.oa-cagliari.inaf.it\/en\/wp-json\/wp\/v2\/seminari\/4470","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oa-cagliari.inaf.it\/en\/wp-json\/wp\/v2\/seminari"}],"about":[{"href":"https:\/\/www.oa-cagliari.inaf.it\/en\/wp-json\/wp\/v2\/types\/seminari"}],"wp:attachment":[{"href":"https:\/\/www.oa-cagliari.inaf.it\/en\/wp-json\/wp\/v2\/media?parent=4470"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}