The MillenniumTNG Project: The large-scale clustering of galaxies

Abstract

Modern redshift surveys are tasked with mapping out the galaxy distribution over enormous distance scales. Existing hydrodynamical simulations, however, do not reach the volumes needed to match upcoming surveys. We present results for the clustering of galaxies using a new, large volume hydrodynamical simulation as part of the MillenniumTNG (MTNG) project. With a computational volume that is $\approx 15$ times larger than the next largest such simulation currently available, we show that MTNG is able to accurately reproduce the observed clustering of galaxies as a function of stellar mass. When separated by colour, there are some discrepancies with respect to the observed population, which can be attributed to the quenching of satellite galaxies in our model. We combine MTNG galaxies with those generated using a semi-analytic model to emulate the sample selection of luminous red galaxies (LRGs) and emission line galaxies (ELGs), and show that although the bias of these populations is approximately (but not exactly) constant on scales larger than $\approx 10$ Mpc, there is significant scale-dependent bias on smaller scales. The amplitude of this effect varies between the two galaxy types, and also between the semi-analytic model and MTNG. We show that this is related to the distribution of haloes hosting LRGs and ELGs. Using mock SDSS-like catalogues generated on MTNG lightcones, we demonstrate the existence of prominent baryonic acoustic features in the large-scale galaxy clustering. We also demonstrate the presence of realistic redshift space distortions in our mocks, finding excellent agreement with the multipoles of the redshift-space clustering measured in SDSS data.

15 pages, 11 figures. Accepted for publication in MNRAS

References in corpus (20)

• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• Properties of galaxies reproduced by a hydrodynamic simulation
• Simulating galaxy formation with black hole driven thermal and kinetic feedback
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
• Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report
• Simulating cosmic structure formation with the GADGET-4 code
• Assembly bias in the clustering of dark matter haloes
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Observational systematics and baryon acoustic oscillations in the correlation function
• Introducing the THESAN project: radiation-magnetohydrodynamic simulations of the epoch of reionization
• The ASTRID simulation: the evolution of Supermassive Black Holes
• The ASTRID Simulation: Galaxy Formation and Reionization
• The host dark matter halos of [OII] emitters at 0.5< z< 1.5
• Galaxy formation with L-GALAXIES: Modelling the environmental dependency of galaxy evolution and comparing with observations
• The galaxy-halo connection of emission-line galaxies in IllustrisTNG
• Illustrating galaxy-halo connection in the DESI era with IllustrisTNG
• The DESI $N$-body Simulation Project -- II. Suppressing sample variance with fast simulations
• The assembly bias of emission line galaxies
• Clustering of emission line galaxies with IllustrisTNG I.: fundamental properties and halo occupation distribution

Cited by in corpus (8)

• The MillenniumTNG Project: The impact of baryons and massive neutrinos on high-resolution weak gravitational lensing convergence maps
• The MillenniumTNG Project: Semi-analytic galaxy formation models on the past lightcone
• The impact of baryons on the internal structure of dark matter haloes from dwarf galaxies to superclusters in the redshift range 0<z<7
• An efficient and robust method to estimate halo concentration
• How do uncertainties in galaxy formation physics impact field-level galaxy bias?
• Differences in baryonic and dark matter scaling relations of galaxy clusters: A comparison between IllustrisTNG simulations and observations
• Capture of dark matter particles by a galaxy in the case of a bimodal distribution of their velocities
• Fast Baryonic Field Painting for Sunyaev-Zel'dovich Analyses: Transfer Function vs. Hybrid Effective Field Theory