The halo mass function in interacting Dark Energy models

Abstract

We present a detailed investigation of the effects that a direct interaction between Dark Energy (DE) and Cold Dark Matter (CDM) particles imprints on the Halo Mass Function (HMF) of groups and clusters of galaxies. Making use of the public halo catalogs of the {\small CoDECS} simulations, we derive the HMF for several different types of coupled DE scenarios both based on the FoF algorithm and on the SO halo identification for different values of the overdensity threshold ${\Delta }_c$. We compare the computed HMFs for coupled DE cosmologies with $\Lambda$CDM as well as with the predictions of the standard analytic fitting functions. Our results show that the standard fitting functions still reproduce reasonably well both the FoF and the SO HMFs of interacting DE cosmologies at intermediate masses and at low redshifts, once rescaled to the characteristic amplitude of linear density perturbations of each specific model as given by ${\sigma }_8$. However, we also find that such apparent degeneracy with ${\sigma }_8$ is broken both by the high-mass tail and by the redshift evolution of our HMFs, with deviations beyond $\sim 10$ for most of the models under investigation. Furthermore, the discrepancy with respect to the predictions of standard fitting functions rescaled with the characteristic value of ${\sigma }_8$ shows -- for some models -- a strong dependence on the spherical overdensity threshold ${\Delta }_c$ used for the halo identification. We find that such effect is due to a significant increase of halo concentration at low redshifts in these models, that is however absent in the majority of the cosmological scenarios considered in this work. We can therefore conclude that the universality of the HMF is violated by cosmological models that feature a direct interaction between DE and CDM.

14pages, 9 figures, 2 tables, accepted version of MNRAS

References in corpus (21)

• Cosmology and the Fate of Dilatation Symmetry
• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• The Milky Way's bright satellites as an apparent failure of LCDM
• Concentration, Spin and Shape of Dark Matter Haloes as a Function of the Cosmological Model: WMAP1, WMAP3 and WMAP5 results
• The redshift dependence of the structure of massive LCDM halos
• Effects of Baryons and Dissipation on the Matter Power Spectrum
• The halo mass function from the dark ages through the present day
• The Halo Mass Function: High-Redshift Evolution and Universality
• Coupled and Extended Quintessence: theoretical differences and structure formation
• Growing Matter
• Interacting Dark Energy -- constraints and degeneracies
• Coupled dark matter-dark energy in light of near Universe observations
• The CoDECS project: a publicly available suite of cosmological N-body simulations for interacting dark energy models
• The Effect of Gas Physics on the Halo Mass Function
• A New Force in the Dark Sector?
• Excess Clustering on Large Scales in the MegaZ DR7 Photometric Redshift Survey
• Dark matter halo abundances, clustering and assembly histories at high redshift
• Clustering and redshift-space distortions in interacting dark energy cosmologies
• Constraints on interacting dark energy models from galaxy Rotation Curves
• Can Coupled Dark Energy Speed Up the Bullet Cluster?
• Weak lensing predictions for coupled dark energy cosmologies at non-linear scales

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