Cosmological structure formation with clustering quintessence

Abstract

We study large-scale structure formation in the presence of a quintessence component with zero speed of sound in the framework of Eulerian Perturbation Theory. Due to the absence of pressure gradients, quintessence and dark matter are comoving and can be studied as a unique fluid in terms of the total energy density contrast and the common velocity. In this description the clustering of quintessence enhances the linear term proportional to the velocity divergence in the continuity equation by a factor (1+w) Omega_Q / Omega_m. This is responsible for a rapid evolution of the growth rate at low redshifts, and modifies the standard relation between the velocity divergence and the growth factor. For the total fluid, the solutions for the linear growth function and growth rate can be written in integral forms and admit simple fitting formulae, as in the LambdaCDM case. At second order in perturbation theory, we derive an explicit expression for the kernels F_2 and G_2. They receive modifications of the order of the ratio between quintessence and total energy density perturbations, which affect the corresponding tree-level bispectra. We finally compute the cumulative signal-to-noise in the power spectrum, bispectrum and reduced bispectrum, expected for departures from a LambdaCDM cosmology both in the clustering and smooth quintessence scenarios. The reduced bispectrum, in particular, receives sensible modifications only in the clustering case and can potentially be used to detect or rule out the model.

36 pages, 11 figures. Replaced to match published version. Two figures added and minor revisions

References in corpus (23)

• The Effective Field Theory of Inflation
• Starting the Universe: Stable Violation of the Null Energy Condition and Non-standard Cosmologies
• Nonlinear Evolution of Baryon Acoustic Oscillations
• Measuring the dark side (with weak lensing)
• Cosmology and the Bispectrum
• The Effective Theory of Quintessence: the w<-1 Side Unveiled
• Flowing with Time: a New Approach to Nonlinear Cosmological Perturbations
• Multi-Point Propagators in Cosmological Gravitational Instability
• Impact of massive neutrinos on nonlinear matter power spectrum
• Non-linear Evolution of Matter Power Spectrum in Modified Theory of Gravity
• Constraining dark energy with cross-correlated CMB and Large Scale Structure data
• Observational constraints on the linear fluctuation growth rate
• Nonlinear power spectrum in the presence of massive neutrinos: perturbation theory approach, galaxy bias and parameter forecasts
• Fingerprinting dark energy
• Baryonic Acoustic Oscillations via the Renormalization Group
• Parameterizing the Effect of Dark Energy Perturbations on the Growth of Structures
• Third-order Perturbation Theory With Non-linear Pressure
• The linear growth rate of structure in Parametrized Post Friedmannian Universes
• Can a galaxy redshift survey measure dark energy clustering?
• Large-Scale Structure in Brane-Induced Gravity I. Perturbation Theory
• Multi-Point Propagators for Non-Gaussian Initial Conditions
• Fingerprinting Dark Energy II: weak lensing and galaxy clustering tests
• Constraining the Nature of Dark Energy using the SKA

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• Resummed propagators in multi-component cosmic fluids with the eikonal approximation
• Phenomenology of dark energy: exploring the space of theories with future redshift surveys
• Dark Energy and Modified Gravity in the Effective Field Theory of Large-Scale Structure
• IR-safe and UV-safe integrands in the EFTofLSS with exact time dependence
• Nonlinear Power Spectrum from Resummed Perturbation Theory: a Leap Beyond the BAO Scale
• Non-linear Fields in Generalized Cosmologies
• Constraints on modified gravity from the BOSS galaxy survey
• Weakening Gravity on Redshift-Survey Scales with Kinetic Matter Mixing
• An effective description of dark matter and dark energy in the mildly non-linear regime
• Measuring primordial non-Gaussianity with weak-lensing surveys
• Probing non-standard gravity with the growth index: a background independent analysis
• Cosmic propagators at two-loop order
• Perturbative description of bias tracers using consistency relations of LSS
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• Exact spherically-symmetric inhomogeneous model with n perfect fluids
• Loop corrections to the power spectrum for massive neutrino cosmologies with full time- and scale-dependence
• Limits on Clustering and Smooth Quintessence from the EFTofLSS
• Clustering dark energy and halo abundances
• Non-linear dark energy clustering
• Cosmological Large-scale Structures beyond Linear Theory in Modified Gravity
• A short review on clustering dark energy
• The growth index of matter perturbations using the clustering of dark energy
• Cosmological perturbations and dynamical analysis for interacting quintessence
• The nonlinear power spectrum in clustering quintessence cosmologies
• Perturbations for transient acceleration
• Alcock-Paczynski Test with the Evolution of Redshift-Space Galaxy Clustering Anisotropy
• Weak lensing probe of cubic Galileon model
• Cosmological Probes of Structure Growth and Tests of Gravity
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• Perturbation theory of LSS in the $\Lambda$CDM Universe: exact time evolution and the two-loop power spectrum
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• Estimating the Integrated Bispectrum from Weak Lensing Maps
• Probing dark energy using convergence power spectrum and bi-spectrum
• Clustering GCG: a viable option for unified dark matter-dark energy?
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• Simulation studies of dark energy clustering induced by the formation of dark matter halos
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• Optimizing the Evolution of Perturbations in the $\Lambda$CDM Universe
• Higher-Order Spectra of Weak Lensing Convergence Maps in Parameterized Theories of Modified Gravity
• Non-linear Eulerian Hydrodynamics of Dark Energy: Riemann problem and Finite Volume Schemes
• Top-Hat Spherical Collapse with Clustering Dark Energy. I. Radius Evolution and Critical Contrast Density
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