Séminaire/Seminar Galaxies |
| « Investigating environmental effects on galaxy morphology in the Pisces-Perseus supercluster using Euclid ERO-Perseus and CFHT-MegaCam synergy » |
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Maëlie Mondelin |
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Using the Euclid Early Release Observations (ERO), I conducted a photometric analysis of galaxies in the Perseus cluster, one of the main nodes of the Pisces Perseus supercluster at a distance of about 70 Mpc. Focusing on evolved discs of S0/S galaxies, this study examines breaks in their surface brightness profiles, providing new insights into how dense environments affect galaxy evolution.
The unprecedented depth and resolution of Euclid reveal low-surface-brightness features, offering a new view of the faint outer regions of galaxies, which serve as tracers of ongoing transformation processes. Building on these results and in preparation for the upcoming DR1 release, we performed a precursor study using deep CFHT MegaCam imaging over a 350 deg2 field, encompassing environments from cluster cores to filament outskirts. Mapping the filamentary network with DisPerSe, we find clear morphological segregation and evidence for alignments with the local cosmic web: red ellipticals dominate and align within clusters, while blue spirals trace sub-filaments.This multi-scale approach enables a detailed exploration of a nearby supercluster, revealing how large-scale structures shape galaxy evolution. |
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jeudi 23 octobre 2025 - 11:30 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |