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Galaxy properties and the cosmic web in simulations

Ofer MetukiRacah Institute of Physics, Hebrew University, Jerusalem 91904, Israel,Noam I. LibeskindLeibniz-Institut für Astrophysik Potsdam (AIP) An der Sternwarte 16, D-14482 Potsdam, GermanyYehuda HoffmanRacah Institute of Physics, Hebrew University, Jerusalem 91904, Israel,Robert A. CrainLeiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, The NetherlandsTom TheunsInstitute for Computational Cosmology, Department of Physics, University of Durham, South Road, Durham DH1 3LE, UK

2014en

ABI

Annotatsiya

We seek to understand the relationship between galaxy properties and their local environment, which calls for a proper formulation of the notion of environment. We analyse the Galaxies-Intergalactic Medium Interaction Calculation suite of cosmological hydrodynamical simulations within the framework of the cosmic web as formulated by Hoffman et al., focusing on properties of simulated dark matter haloes and luminous galaxies with respect to voids, sheets, filaments, and knots – the four elements of the cosmic web. We find that the mass functions of haloes depend on environment, which drives other environmental dependence of galaxy formation. The web shapes the halo mass function, and through the strong dependence of the galaxy properties on the mass of their host haloes, it also shapes the galaxy-(web) environment dependence.

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DOI: 10.1093/mnras/stu2166

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