There are no scheduled talks today.
Characterization of Planetary Atmospheres
Karan Molaverdikhani
Fri, 21 Jun 2019, 15:00
Fundamental Physics with High-Energy Cosmic Neutrinos
Dr. Mauricio Bustamante
Mon, 24 Jun 2019, 16:30
Lynton Ardizzone
Tue, 25 Jun 2019, 14:15

Dwarf Galaxies in Cosmological Simulations: Fundamental Relations & the Effects of Environment

Christoph Engler , ARI
Galaxies are shaped by their surrounding environment. Whether they reside in high-mass galaxy clusters, smaller groups or in the field, the characteristics of their baryonic components and the properties of their dark matter halos can appear very differently. These effects are especially distinct for dwarf galaxies, which are highly susceptible to external influence due to their low mass. We use the cosmological hydrodynamical simulations Illustris and IllustrisTNG to study the evolution of galaxies in a cosmological context and examine the connection of galaxy properties and their fundamental scaling relations, e.g. the mass-metallicity or the stellar-to-halo mass relation. We compare distributions of satellite galaxies in host halos of different mass with central galaxies and find the relations of these two galaxy populations to show clear offsets. But what properties of their environment are responsible for these differences? Why do properties of satellite galaxies show correlations with an increased scatter? And do these trends stay the same for different environments? Using quantities such as host mass, clustercentric distance or infall time to assess the strength of external effects, I will portray the impact of environment on galaxies as well as their surrounding dark matter halos.
ARI Institute Colloquium
31 Jan 2019, 11:15
ARI Moenchhofstrasse 12-14, Seminarraum 1

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