Spherical collapse model in dark energy cosmologies

Abstract

We study the spherical collapse model for several dark energy scenarios using the fully nonlinear differential equation for the evolution of the density contrast within homogeneous spherical overdensities derived from Newtonian hydrodynamics. While mathematically equivalent to the more common approach based on the differential equation for the radius of the perturbation, this approach has substantial conceptual as well as numerical advantages. Among the most important are that no singularities at early times appear, which avoids numerical problems in particular in applications to cosmologies with dynamical and early dark energy, and that the assumption of time-reversal symmetry can easily be dropped where it is not strictly satisfied. We use this approach to derive the two parameters characterising the spherical-collapse model, i.e.~the linear density threshold for collapse ${\delta }_{\mathrm{c}}$ and the virial overdensity ${\Delta }_{\mathrm{V}}$, for a broad variety of dark-energy models and to reconsider these parameters in cosmologies with early dark energy. We find that, independently of the model under investigation, ${\delta }_{\mathrm{c}}$ and ${\Delta }_{\mathrm{V}}$ are always very close to the values obtained for the standard $\Lambda$CDM model, arguing that the abundance of and the mean density within non-linear structures are quite insensitive to the differences between dark-energy cosmologies. Regarding early dark energy, we thus arrive at a different conclusion than some earlier papers, including one from our group, and we explain why.

11 pages, 7 figures, accepted for publications on MNRAS

References in corpus (12)

• Dynamics of dark energy
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
• Structure formation in the presence of dark energy perturbations
• Top ten accelerating cosmological models
• Dynamical Mutation of Dark Energy
• Strong lensing statistics and the power spectrum normalisation
• Cluster abundances and S-Z power spectra: effects of non-Gaussianity and early dark energy
• The signature of dark energy perturbations in galaxy cluster surveys
• Simulations of Quintessential Cold Dark Matter: beyond the cosmological constant
• Effects of early dark energy on strong cluster lensing
• Impact of early dark energy on the Planck SZ cluster sample

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