Evolution of density perturbations in decaying vacuum cosmology: The case of non-zero perturbations in the cosmological term

Abstract

We extend the results of a previous paper where a model of interacting dark energy, with a cosmological term decaying linearly with the Hubble parameter, is tested against the observed mass power spectrum. In spite of the agreement with observations of type Ia supernovas, baryonic acoustic oscillations and the cosmic microwave background, we had shown previously that no good concordance is achieved if we include the mass power spectrum. However, our analysis was based on the ad hoc assumption that the interacting cosmological term is strictly homogeneous. Now we perform a more complete analysis, by perturbing such a term. Although our conclusions are still based on a particular, scale invariant choice of the primordial spectrum of dark energy perturbations, we show that a cosmological term decaying linearly with the Hubble parameter is indeed disfavored as compared to the standard model.

arXiv commentVersion accepted for publication in Physical Review D

References in corpus (47)

• The Cosmological Constant and Dark Energy
• Cosmological Constant - the Weight of the Vacuum
• The Case for a Positive Cosmological Lambda-term
• The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
• The 2dF Galaxy Redshift Survey: Power-spectrum analysis of the final dataset and cosmological implications
• The 3D power spectrum of galaxies from the SDSS
• The holographic principle
• The 2dF Galaxy Redshift Survey: The power spectrum and the matter content of the universe
• Transition of the dark energy equation of state in an interacting holographic dark energy model
• Constraints on the interacting holographic dark energy model
• The scaling evolution of cosmological constant
• Cosmologies with Energy Exchange
• Holography and Variable Cosmological Constant
• Interacting Dark Energy and Dark Matter: observational Constraints from Cosmological Parameters
• Cosmological parameters from CMB measurements and the final 2dFGRS power spectrum
• Running G and Λat low energies from physics at M_X: possible cosmological and astrophysical implications
• Bulk Viscous Cosmology
• TASI Lectures on the Cosmological Constant
• Testing the viability of the interacting holographic dark energy model by using combined observational constraints
• Scaling Cosmology
• Interpreting Cosmological Vacuum Decay
• Matter density perturbations in interacting quintessence models
• A cosmological constant from the QCD trace anomaly?
• LXCDM: a cosmon model solution to the cosmological coincidence problem?
• Friedmann cosmology with decaying vacuum density
• Non-Vacuum Initial States for Cosmological Perturbations of Quantum-Mechanical Origin
• Decay of cosmological constant as Bose condensate evaporation
• The Running of the Cosmological and the Newton Constant controlled by the Cosmological Event Horizon
• Dark Energy and Some Alternatives: a Brief Overview
• Observational constraints on late-time Lambda(t) cosmology
• Density Perturbations for Running Cosmological Constant
• Supernova constraints on decaying vacuum cosmology
• Studying the decay of the vacuum energy with the observed density fluctuation spectrum
• Evolution of density perturbations in decaying vacuum cosmology
• Cosmological Constraints on Invisible Decay of Dark Matter
• Holographic Dark Energy and the Universe Expansion Acceleration
• Coupled quintessence and vacuum decay
• Effective growth of matter density fluctuations in the running LCDM and LXCDM models
• Exact solutions of Brans-Dicke cosmology with decaying vacuum density
• On the vacuum entropy and the cosmological constant
• From de Sitter to de Sitter: A non-singular inflationary universe driven by vacuum
• A New Large-Number Coincidence and a Scaling Law for the Cosmological Constant
• Relaxing neutrino mass bounds by a running cosmological constant
• The cosmic coincidence in Brans-Dicke cosmologies
• Non-singular inflation with vacuum decay
• Adiabatic Particle Production with Decaying $\Lambda$ and Anisotropic Universe
• Friedmann cosmology on codimension 2 brane with time dependent tension

Cited by in corpus (26)

• Hubble expansion & Structure Formation in Time Varying Vacuum Models
• CDM Accelerating Cosmology as an Alternative to LCDM model
• Hubble expansion and structure formation in the "running FLRW model" of the cosmic evolution
• New Cosmic Accelerating Scenario without Dark Energy
• Dark energy perturbations and cosmic coincidence
• Gluonic vacuum, q-theory, and the cosmological constant
• Cosmological consequences of a possible $\Lambda$-dark matter interaction
• Cosmic perturbations with running G and Lambda
• Non-adiabatic perturbations in decaying vacuum cosmology
• Cosmology with interaction in the dark sector
• On the equivalence of Lambda(t) and gravitationally induced particle production cosmologies
• Observational constraints on decaying vacuum dark energy model
• CMB and matter power spectra with non-linear dark-sector interactions
• Cosmological singularities and analytical solutions in varying vacuum cosmologies
• Self-interacting holographic dark energy
• Constraints on running vacuum model with $H(z)$ and $f{\sigma }_8$
• Perturbations in the relaxation mechanism for a large cosmological constant
• Cosmological Perturbations and the Running Cosmological Constant Model
• Running Vacuum Cosmological Models: Linear Scalar Perturbations
• Running cosmological constant with observational tests
• Perturbations in the interacting vacuum
• Cosmological Constraints on the Phenomenological Interacting Dark Energy Model with Fermi Gamma-Ray Bursts and DESI DR2
• Observational constraints on running vacuum model
• Matter density perturbation and power spectrum in running vacuum model
• Deflation of the cosmological constant associated with inflation and dark energy
• Non-linear structure formation in the "Running FLRW" cosmological model