Probing Dark Energy at Galactic and Cluster Scales

Abstract

We investigate dark matter halo properties as a function of a time--varying dark energy equation of state. The dynamics of the collapse of the halo is governed by the form of the quintessence potential, the time evolution of its equation of state, the initial conditions of the field and its homogeneity nature in the highly non--linear regime. These have a direct impact on the turnaround, virialisation and collapse times, altering in consequence the non--linear density contrast and virial radius. We compute halo concentrations using the Eke, Navarro & Steinmetz algorithm, examining two extreme scenarios: first, we assume that the quintessence field does not exhibit fluctuations on cluster scales and below - homogeneous fluid; second, we assume that the field inside the overdensity collapses along with the dark matter - inhomogeneous fluid. The Eke, Navarro & Steinmetz prescription reveals, in general, higher halo concentrations in inhomogeneous dark energy models than in their homogeneous equivalents. Halo concentrations appear to be controlled by both changes in formation epochs of the halo cores as well as by differing virialisation overdensities. We derive physical halo properties in all models and discuss their observational implications. We examine two possible methods for comparing observations with theoretical predictions. The first method works on galaxy cluster scales and consists of fitting the observed X-ray cluster gas density distributions to those predicted for an NFW profile. The second method works on galaxy scales and involves the observational measurement of the so--called central density parameter.

17 pages, 4 figures. Published in JCAP. Correction of figure 2

References in corpus (70)

• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• A Universal Density Profile from Hierarchical Clustering
• Chameleon Cosmology
• Cosmological Tracking Solutions
• New Constraints on ${\Omega }_M$, ${\Omega }_{\Lambda }$, and w from an Independent Set of Eleven High-Redshift Supernovae Observed with HST
• Concentrations of Dark Halos from their Assembly Histories
• Accelerated expansion of the universe driven by tachyonic matter
• Cluster Abundance Constraints on Quintessence Models
• The age dependence of halo clustering
• Quintessence arising from exponential potentials
• Cosmology with tachyon field as dark energy
• The Power Spectrum Dependence of Dark Matter Halo Concentrations
• Can the clustered dark matter and the smooth dark energy arise from the same scalar field ?
• Cosmic Background Anisotropies in CDM Cosmology
• Quintessence and Supergravity
• Evading Equivalence Principle Violations, Cosmological and other Experimental Constraints in Scalar Field Theories with a Strong Coupling to Matter
• Phenomenology of a realistic accelerating universe using only Planck-scale physics
• Observational constraints on low redshift evolution of dark energy: How consistent are different observations?
• On the spherical collapse model in dark energy cosmologies
• Linear and non-linear perturbations in dark energy models
• Could supermassive black holes be quintessential primordial black holes?
• X-ray gas density profile of clusters of galaxies from the universal dark matter halo
• Varying Alpha in a More Realistic Universe
• Strongly Coupled Chameleon Fields: New Horizons in Scalar Field Theory
• The Mass Power Spectrum in Quintessence Cosmological Models
• Quintessential Haloes around Galaxies
• Galaxy Halo Occupation at High Redshift
• Structure formation in the presence of dark energy perturbations
• Structure Formation in Inhomogeneous Dark Energy Models
• Local and Global Variations of The Fine Structure Constant
• Cosmological structure formation in a homogeneous dark energy background
• Constraining dark energy from the abundance of weak gravitational lenses
• Cluster number counts dependence on dark energy inhomogeneities and coupling to dark matter
• Newtonian Collapse of Scalar Field Dark Matter
• Galactic Collapse of Scalar Field Dark Matter
• Inflation, cold dark matter, and the central density problem
• On virialization with dark energy
• More hilltop inflation models
• Dark energy and the evolution of spherical overdensities
• Halo properties in models with dynamical Dark Energy
• Cosmon dark matter?
• On globally static and stationary cosmologies with or without a cosmological constant and the Dark Energy problem
• Arc Statistics in Cosmological Models with Dark Energy
• Voids of dark energy
• Virialization in Dark Energy Cosmology
• The signature of dark energy on the local Hubble flow
• Astrophysical Configurations with Background Cosmology: Probing Dark Energy at Astrophysical Scales
• Gravitational Lensing Statistics in Universes Dominated by Dark Energy
• Dark energy records in lensed cosmic microwave background
• Halo Concentrations and Weak-Lensing Number Counts in Dark Energy Cosmologies
• Dynamical Mutation of Dark Energy
• Number counts in homogeneous and inhomogeneous dark energy models
• Quasi-spherical collapse with cosmological constant
• Virialization of cosmological structures in models with time varying equation of state
• Are Galaxies Cosmon Lumps?
• Non-linear perturbations in scalar-tensor cosmologies
• Dark energy parameterizations and their effect on dark halos
• Strong Gravitational Lensing and Dynamical Dark Energy
• Dark Matter-baryon segregation in the non-linear evolution of coupled Dark Energy model
• Cluster Lensing of QSOs as a Probe of LCDM and Dark Energy Cosmologies
• Correlation Between the Halo Concentration (c) and the Virial Mass (Mvir) Determined from X-ray Clusters
• Strong lensing by cluster-sized haloes in dark-energy cosmologies
• Spherical collapse with dark energy
• The Halo Density Profiles with Non-Standard N-body Simulations
• Dynamical quintessence fields Press-Schechter mass function: detectability and effect on dark haloes
• Combining Weak Lensing Tomography with Halo Clustering to Probe Dark Energy
• Virialization of matter overdensities within dark energy subsystems: special cases
• Dark Energy and Dark Matter in Galaxy Halos
• R3 fluids

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• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology and fundamental physics with the Euclid satellite
• Dark Matter and Dark Energy Interactions: Theoretical Challenges, Cosmological Implications and Observational Signatures
• Interacting Dark Energy -- constraints and degeneracies
• Cosmological constraints on interacting dark energy with redshift-space distortion after Planck data
• Dark energy in light of the early JWST observations: case for a negative cosmological constant?
• Chameleon dark energy models with characteristic signatures
• The imprint of the interaction between dark sectors in galaxy clusters
• The spherical collapse model and cluster formation beyond the $\Lambda$ cosmology: Indications for a clustered dark energy?
• The High Redshift Integrated Sachs-Wolfe Effect
• The spherical collapse model in time varying vacuum cosmologies
• Early Dark Energy at High Redshifts: Status and Perspectives
• Galaxy cluster number count data constraints on cosmological parameters
• Testing flatness of the universe with probes of cosmic distances and growth
• A comparison of perturbations in fluid and scalar field models of dark energy
• A short review on clustering dark energy
• Robust constraints on dark energy and gravity from galaxy clustering data
• Evolution of perturbations in distinct classes of canonical scalar field models of dark energy
• Cluster Probes of Dark Energy Clustering
• Scalar field dark energy perturbations and the Integrated Sachs Wolfe effect
• ISW-LSS cross-correlation in coupled Dark Energy models with massive neutrinos
• Dynamical evolutin of quintessence dark energy in collapsing dark matter halos
• Testing feasibility of scalar-tensor gravity by scale dependent mass and coupling to matter
• Unifying static analysis of gravitational structures with a scale-dependent scalar field gravity as an alternative to dark matter
• Constraining Thawing Dark Energy using Galaxy Cluster Number Counts
• Perturbed dark energy: classical scalar field versus tachyon
• Do Bound Structures Brake Cosmic Acceleration?
• Spherical collapse in coupled quintessence with a $\Lambda$CDM background
• Cosmic expansion and structure formation in running vacuum cosmologies
• High-precision spectra for dynamical Dark Energy cosmologies from constant-w models
• High accuracy power spectra including baryonic physics in dynamical Dark Energy models
• Spherical collapse in reconstructed dark energy models