Cold dark energy constraints from the abundance of galaxy clusters

Abstract

We constrain cold dark energy of negligible sound speed using galaxy cluster abundance observations. In contrast to standard quasi-homogeneous dark energy, negligible sound speed implies clustering of the dark energy fluid at all scales, allowing us to measure the effects of dark energy perturbations at cluster scales. We compare those models and set the stage for using non-linear information from semi-analytical modelling in cluster growth data analyses. For this, we recalibrate the halo mass function with non-linear characteristic quantities, the spherical collapse threshold and virial overdensity, that account for model and redshift dependent behaviours, as well as an additional mass contribution for cold dark energy. We present the first constraints from this cold dark matter plus cold dark energy mass function using our cluster abundance likelihood, which self-consistently accounts for selection effects, covariances and systematic uncertainties. We combine cluster growth data with CMB, SNe Ia and BAO data, and find a shift between cold versus quasi-homogeneous dark energy of up to $1\sigma$. We make a Fisher matrix forecast of constraints attainable with cluster growth data from the on-going Dark Energy Survey (DES). For DES, we predict $\sim$50$\%$ tighter constraints on $\left({\Omega }_{\mathrm{m}},w\right)$ for cold dark energy versus $w$CDM models, with the same free parameters. Overall, we show that cluster abundance analyses are sensitive to cold dark energy, an alternative, viable model that should be routinely investigated alongside the standard dark energy scenario.

14 pages, 6 figures, 3 tables. Accepted for publiction in MNRAS

References in corpus (23)

• Dynamics of dark energy
• Beyond the Cosmological Standard Model
• A Parameterized Post-Friedmann Framework for Modified Gravity
• Report of the Dark Energy Task Force
• Weighing the Giants IV: Cosmology and Neutrino Mass
• Effects of Scale-Dependent Non-Gaussianity on Cosmological Structures
• Cosmological Constraints from Galaxy Clusters in the 2500 square-degree SPT-SZ Survey
• Non-linear Evolution of f(R) Cosmologies III: Halo Statistics
• The Effective Theory of Quintessence: the w<-1 Side Unveiled
• The Excursion Set Theory of Halo Mass Functions, Halo Clustering, and Halo Growth
• Cosmology and Astrophysics from Relaxed Galaxy Clusters II: Cosmological Constraints
• Crossing the Phantom Divide with Parameterized Post-Friedmann Dark Energy
• Cluster Constraints on f(R) Gravity
• KiDS-450: The tomographic weak lensing power spectrum and constraints on cosmological parameters
• Weighing the Giants V: Galaxy Cluster Scaling Relations
• Parametrized Post-Friedmann Signatures of Acceleration in the CMB
• Effects of shear and rotation on the spherical collapse model for clustering dark energy
• The spherical collapse model and cluster formation beyond the $\Lambda$ cosmology: Indications for a clustered dark energy?
• Cluster abundance in chameleon $f(R)$ gravity I: toward an accurate halo mass function prediction
• Dynamical Mutation of Dark Energy
• The signature of dark energy perturbations in galaxy cluster surveys
• Constraining the halo mass function with observations
• Constraints on shear and rotation with massive galaxy clusters

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