Strongly Coupled Dark Energy Cosmologies: preserving LCDM success and easing low scale problems II - Cosmological simulations

Abstract

In this second paper we present the first Nbody cosmological simulations of strongly coupled Dark Energy models (SCDEW), a class of models that alleviates theoretical issues related to the nature of dark energy. SCDEW models assume a strong coupling between Dark Energy (DE) and an ancillary Cold Dark Matter (CDM) component together with the presence of an uncoupled Warm Dark Matter component. The strong coupling between CDM and DE allows us to preserve small scale fluctuations even if the warm particle is quite light ($\approx 100$ eV). Our large scale simulations show that, for $10^{11}<M/M_{\odot }<10^{14}$, SCDEW haloes exhibit a number density and distribution similar to a standard Lambda Cold Dark Matter (LCDM) model, even though they have lower concentration parameters. High resolution simulation of a galactic halo ($M\sim 10^{12}{M}_{\odot }$) shows $\sim 60\%$ less substructures than its LCDM counterpart, but the same cuspy density profile. On the scale of galactic satellites ($M\sim 10^9{M}_{\odot }$) SCDEW haloes dramatically differ from LCDM. Due to the high thermal velocities of the WDM component they are almost devoid of any substructures and present strongly cored dark matter density profiles. These density cores extend for several hundreds of parsecs, in very good agreement with Milky Way satellites observations. Strongly coupled models, thanks to their ability to match observations on both large and small scales might represent a valid alternative to a simple LCDM model.

9 pages, 10 figures, MNRAS accepted, the companion paper can be found at http://arxiv.org/abs/1503.07875

References in corpus (15)

• Cosmology and the Fate of Dilatation Symmetry
• Cosmological Constraints from the SDSS Luminous Red Galaxies
• Concentration, Spin and Shape of Dark Matter Haloes as a Function of the Cosmological Model: WMAP1, WMAP3 and WMAP5 results
• Forged in FIRE: cusps, cores, and baryons in low-mass dwarf galaxies
• Can sterile neutrinos be the dark matter?
• A mass-dependent density profile for dark matter haloes including the influence of galaxy formation
• How cold is cold dark matter? Small scales constraints from the flux power spectrum of the high-redshift Lyman-alpha forest
• High Resolution Optical Velocity Fields of 11 Low Surface Brightness Galaxies
• The Growth of Structure in Interacting Dark Energy Models
• The Dependence of the Mass Assembly History of Cold Dark Matter Halos on Environment
• On the Structure of Dark Matter Halos at the Damping Scale of the Power Spectrum with and without Relict Velocities
• The phase space density of fermionic dark matter haloes
• Raytracing simulations of coupled dark energy models
• Dark energy from dark radiation in strongly coupled cosmologies with no fine tuning
• Strongly Coupled Dark Energy Cosmologies: preserving LCDM success and easing low scale problems I - Linear theory revisited

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