Clash of Titans: the impact of cluster mergers in the galaxy cluster red sequence

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dc.contributor.authorAldas, Franklin, Zenteno, Alfredo, Gomez, Facundo A., Hernandez-Lang, Daniel, Carrasco, Eleazar R., Vega-Martinez, Cristian A., Castellon, J. L. Nilo
dc.date.accessioned2024-11-27T21:50:38Z
dc.date.available2024-11-27T21:50:38Z
dc.date.issued2023/10/01
dc.description.abstractMerging of galaxy clusters are some of the most energetic events in the Universe, and they provide a unique environment to study galaxy evolution. We use a sample of 84 merging and relaxed SPT galaxy clusters candidates, observed with the Dark Energy Camera in the 0.11 < z < 0.88 redshift range, to build colour-magnitude diagrams to characterize the impact of cluster mergers on the galaxy population. We divided the sample between relaxed and disturbed, and in two redshifts bin at z = 0.55. When comparing the high-z to low-z clusters we find the high-z sample is richer in blue galaxies, independently of the cluster dynamical state. In the high-z bin, we find that disturbed clusters exhibit a larger scatter in the red sequence, with wider distribution and an excess of bluer galaxies compared to relaxed clusters, while in the low-z bin we find a complete agreement between the relaxed and disturbed clusters. Our results support the scenario in which massive cluster halos at z < 0.55 galaxies are quenched as satellites of another structure, i.e. outside the cluster, while at z >= 0.55 the quenching is dominated by in situ processes.
dc.identifier.doihttp://dx.doi.org/10.1093/mnras/stad2261
dc.identifier.issn0035-8711
dc.identifier.urihttps://publicacionesabiertas.userena.cl/handle/123456789/145
dc.languageEnglish
dc.publisherOXFORD UNIV PRESS
dc.subjectCOLOR-MAGNITUDE RELATION, COOL-CORE CLUSTERS, STAR-FORMATION, X-RAY, RICH CLUSTERS, STELLAR LOCUS, EVOLUTION, POPULATIONS, SUBSTRUCTURE, CALIBRATION
dc.titleClash of Titans: the impact of cluster mergers in the galaxy cluster red sequence
dc.typeArticle

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