Séminaire Univers / |
| « Probing the azimuthal environment of galaxies around clusters. From cluster core to cosmic filaments » |
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Céline Gouin |
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Galaxy clusters are connected at their peripheries to the large scale structures by cosmic filaments that funnel accreting material. These filamentary structures are studied to investigate both environment-driven galaxy evolution and structure formation and evolution.
In this presentation, I probe in a statistical manner the azimuthal distribution of galaxies around clusters by performing harmonic decompositions in large photometric galaxy catalogues around 6400 SDSS clusters (0.1< z <0.3). In the inner cluster regions, the galaxy distribution traces an ellipsoidal shape, which is more pronounced for rich clusters. In the clusters' outskirts, filamentary patterns are detected in harmonic space: massive clusters seem to have a larger number of connected filaments than low-mass ones. Finally, our results suggest a gradient of galaxy activity in filaments around clusters. |
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mardi 10 mars 2020 - 11:15 Salle 281 Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |