Séminaire/Seminar Galaxies |
| « Velocity waves in lines-of-sight: signature of local galaxy clusters » |
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Jenny Sorce |
| Galaxy clusters are excellent cosmological probes provided that their mass estimates are properly calibrated and bias-free. Several techniques exist to estimate galaxy cluster masses. Velocity waves, observed around galaxy clusters in the Hubble diagram, constitute such a potential technique. Such waves have however mostly been studied separately in observations and cosmological simulations. Using the latest cosmological simulation of our cosmic environment (a.k.a. CLONE: Constrained LOcal & Nesting Environment Simulation), I will present comparisons between velocity waves that arise in the lines-of-sight of the most massive simulated dark matter halos to those observed in local galaxy velocity catalogs in the lines-of-sight of Virgo, Centaurus, Coma and several other local clusters. I will investigate the relation between cluster mass and velocity wave properties and conclude with some possible developments. |
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jeudi 30 mars 2023 - 11:30 Salle du Conseil Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |