The impact of baryonic physics on the subhalo mass function and implications for gravitational lensing

Abstract

We investigate the impact of baryonic physics on the subhalo population by analyzing the results of two recent hydrodynamical simulations (EAGLE and Illustris), which have very similar configuration, but a different model of baryonic physics. We concentrate on haloes with a mass between $10^{12.5}$ and $10^{14}{M}_{\odot }{h}^{-1}$ and redshift between 0.2 and 0.5, comparing with observational results and subhalo detections in early-type galaxy lenses. We compare the number and the spatial distribution of subhaloes in the fully hydro runs and in their dark matter only counterparts, focusing on the differences between the two simulations. We find that the presence of baryons reduces the number of subhaloes, especially at the low mass end ($\le 10^{10}{M}_{\odot }{h}^{-1}$), by different amounts depending on the model. The variations in the subhalo mass function are strongly dependent on those in the halo mass function, which is shifted by the effect of stellar and AGN feedback. Finally, we search for analogues of the observed lenses (SLACS) in the simulations, selecting them in velocity dispersion and dynamical properties. We use the selected galaxies to quantify detection expectations based on the subhalo populations in the different simulations, calculating the detection probability and the predicted values for the projected dark matter fraction in subhaloes $f_{DM}$ and the slope of the mass function $\alpha$. We compare these values with those derived from subhalo detections in observations and conclude that the dark-matter-only and hydro EAGLE runs are both compatible with observational results, while results from the hydro Illustris run do not lie within the errors.

15 pages, 11 figures, accepted for publication in MNRAS

References in corpus (15)

• 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
• The EAGLE simulations of galaxy formation: calibration of subgrid physics and model variations
• Baryon effects on the internal structure of LCDM halos in the EAGLE simulations
• Bayesian Strong Gravitational-Lens Modeling on Adaptive Grids: Objective Detection of Mass Substructure in Galaxies
• A blueprint for detecting supersymmetric dark matter in the Galactic halo
• Too Big to Fail in the Local Group
• Bent by baryons: the low mass galaxy-halo relation
• Inference of the Cold Dark Matter substructure mass function at z=0.2 using strong gravitational lenses
• SubHaloes going Notts: The SubHalo-Finder Comparison Project
• The abundance of (not just) dark matter haloes
• The Cosmic Code Comparison Project
• How well can cold-dark-matter substructures account for the observed radio flux-ratio anomalies?
• Shaken and Stirred: The Milky Way's Dark Substructures
• Analytical Approach to Subhaloes Population in Dark Matter Haloes

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