Top-Hat Spherical Collapse with Clustering Dark Energy. I. Radius Evolution and Critical Contrast Density

Abstract

Understanding the influence of dark energy on the formation of structures is currently a major challenge in Cosmology, since it can distinguish otherwise degenerated viable models. In this work we consider the Top-Hat Spherical-Collapse (SC) model with dark energy, which can partially (or totally) cluster, according to a free parameter $\gamma$. The {\it lack of} energy conservation has to be taken into account accordingly, as we will show. We determine characteristic quantities for the SC model, such as the critical contrast density and radius evolution, with particular emphasis on their dependence on the clustering parameter $\gamma$.

arXiv comment14 pages, 9 figures, accepted for publication in Physics of the Dark Universe

References in corpus (31)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Planck 2015 results. XIII. Cosmological parameters
• f(R) Theories Of Gravity
• The Case for a Positive Cosmological Lambda-term
• Cosmology and the Fate of Dilatation Symmetry
• Essentials of k-essence
• Cosmological Tracking Solutions
• Cosmology with Ultra-light Pseudo-Nambu-Goldstone Bosons
• On the spherical collapse model in dark energy cosmologies
• Non-linear Evolution of f(R) Cosmologies III: Halo Statistics
• Hubble expansion & Structure Formation in Time Varying Vacuum Models
• Structure formation in the presence of dark energy perturbations
• Spherical collapse in quintessence models with zero speed of sound
• On virialization with dark energy
• The Viability of Phantom Dark Energy: A Brief Review
• Spherical collapse and halo mass function in f(R) theories
• Spherical Collapse in f(R) Gravity
• Clarifying spherical collapse in coupled dark energy cosmologies
• Cosmological structure formation with clustering quintessence
• The spherical collapse model in time varying vacuum cosmologies
• Dynamical Mutation of Dark Energy
• Spherical Collapse in Chameleon Models
• On the implementation of the spherical collapse model for dark energy models
• Spherical collapse model with non-clustering dark energy
• Clustering dark energy and halo abundances
• Spherical collapse model in agegraphic dark energy cosmologies
• Calculation of the critical overdensity in the spherical-collapse approximation
• Dynamical-Screening and the Phantom-Like Effects in a DGP-Inspired $F(R,\varphi )$ Model
• Nonlinear spherical perturbations in Quintessence Models of Dark Energy
• Spherical collapse and cluster number counts in dark energy models disformally coupled to dark matter

Cited by in corpus (1)

• The $S_8$ Tension in Light of Updated Redshift-Space Distortion Data and PAge Approximation