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- W4380028130 abstract "ABSTRACT We quantify the evolution of matter and galaxy clustering in cosmological hydrodynamical simulations via correlation and bias functions of matter and galaxies. We use simulations TNG100 and TNG300 with epochs from z = 5 to z = 0. We calculate spatial correlation functions (CFs) of galaxies, ξ(r), for simulated galaxies and dark matter (DM) particles to characterize the evolving cosmic web. We find that bias parameters decrease during the evolution, confirming earlier results. Bias parameters of the lowest luminosity galaxies, b0, estimated from CFs are lower relative to CFs of particle density-limited clustered samples of DM. At low and medium luminosities, bias parameters of galaxies are equal, suggesting that dwarf galaxies reside in the same filamentary web as brighter galaxies. We find that bias parameters b0, estimated from CFs of clustered DM, agree with the expected values from the fraction of particles in the clustered population, b = 1/Fc. The cosmic web contains filamentary structures of various densities, and fractions of matter in the clustered and the unclustered populations are both less than unity. Thus, the CF amplitude of the clustered matter is always higher than that for all matter, i.e. bias parameter must be b > 1. Differences between CFs of galaxies and clustered DM suggest that these functions describe different properties of the cosmic web." @default.
- W4380028130 created "2023-06-10" @default.
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- W4380028130 date "2023-06-08" @default.
- W4380028130 modified "2023-09-27" @default.
- W4380028130 title "Evolution of matter and galaxy clustering in cosmological hydrodynamical simulations" @default.
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- W4380028130 doi "https://doi.org/10.1093/mnras/stad1686" @default.
- W4380028130 hasPublicationYear "2023" @default.
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