Scalar and vector perturbations in a universe with nonlinear perfect fluid

Abstract

We study a three-component universe filled with dust-like matter in the form of discrete inhomogeneities (e.g., galaxies) and perfect fluids characterized by linear and nonlinear equations of state. Within the cosmic screening approach, we develop the theory of scalar and vector perturbations. None of the energy density contrasts associated with the distinct components is treated as small. Consequently, the derived equations are valid at both sub- and super-horizon scales and enable simulations for a variety of cosmological models.

arXiv comment11 pages, no figures

References in corpus (28)

• Cosmological Imprint of an Energy Component with General Equation of State
• An alternative to quintessence
• Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
• Unification of Dark Matter and Dark Energy: the Inhomogeneous Chaplygin Gas
• Cosmological Non-Linearities as an Effective Fluid
• Large Scale Cosmic Microwave Background Anisotropies and Dark Energy
• Connection between Newtonian simulations and general relativity
• Gauge-invariant analysis of perturbations in Chaplygin gas unified models of dark matter and dark energy
• Cosmological constraints on a decomposed Chaplygin gas
• First-order Cosmological Perturbations Engendered by Point-like Masses
• The $\Lambda \mathrm{CDM}$ Limit of the Generalized Chaplygin Gas Scenario
• Quasi-local variables in spherical symmetry: numerical applications to dark matter and dark energy sources
• The onset of the non-linear regime in unified dark matter models
• Linear and non-Linear Instabilities in Unified Dark Energy Models
• Remarks on mechanical approach to observable Universe
• Extending the generalized Chaplygin gas model by using geometrothermodynamics
• Hubble flows and gravitational potentials in observable Universe
• Matter power spectrum for the generalized Chaplygin gas model: The relativistic case
• Cosmic screening of the gravitational interaction
• Scalar and vector perturbations in a universe with discrete and continuous matter sources
• Second-order Cosmological Perturbations Engendered by Point-like Masses
• Duel of cosmological screening lengths
• Perfect fluids with $\omega =\mathrm{const}$ as sources of scalar cosmological perturbations
• Cosmological law of universal gravitation
• Effect of the spatial curvature of the Universe on the form of the gravitational potential
• Scalar perturbations in cosmological $f(R)$ models: the cosmic screening approach
• Analytic expressions for the second-order scalar perturbations in the $\Lambda$CDM Universe within the cosmic screening approach
• Effect of peculiar velocities on the gravitational potential in cosmological models with perfect fluids

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• Screening vs. gevolution: in chase of a perfect cosmological simulation code
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• Tracing Cosmological Signature with Doppler Lensing: Insights from Cosmological Simulations