Future weak lensing constraints in a dark coupled universe

Bernardis, Francesco De; Martinelli, Matteo; Melchiorri, A.; Mena, Olga; Cooray, Asantha

doi:10.1103/physrevd.84.023504

Cited by 37 publications

(27 citation statements)

References 74 publications

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“…We therefore divide the redshift space in 10 bins, chosen in such a way to have the same fraction of the total observed galaxies in each one (see Table I). Using these specifications we build the -by-convergence power spectrum and the 1σ uncertainties, computed as [45,46] …”

Section: Weak Lensing Datamentioning

confidence: 99%

Dark energy coupling with electromagnetism as seen from future low-medium redshift probes

et al. 2014

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Beyond the standard cosmological model the late-time accelerated expansion of the universe can be reproduced by the introduction of an additional dynamical scalar field. In this case, the field is expected to be naturally coupled to the rest of the theory's fields, unless a (still unknown) symmetry suppresses this coupling. Therefore, this would possibly lead to some observational consequences, such as space-time variations of nature's fundamental constants. In this paper we investigate the coupling between a dynamical Dark Energy model and the electromagnetic field, and the corresponding evolution of the fine structure constant (α) with respect to the standard local value α0. In particular, we derive joint constraints on two dynamical Dark Energy model parametrizations (the Chevallier-Polarski-Linder and Early Dark Energy model) and on the coupling with electromagnetism ζ, forecasting future low-medium redshift observations. We combine supernovae and weak lensing measurements from the Euclid experiment with high-resolution spectroscopy measurements of fundamental couplings and the redshift drift from the European Extremely Large Telescope, highlighting the contribution of each probe. Moreover, we also consider the case where the field driving the α evolution is not the one responsible for cosmic acceleration and investigate how future observations can constrain this scenario.PACS numbers: 95.36.+x, 97.60.Bw, 98.80.Es

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Section: Weak Lensing Datamentioning

confidence: 99%

Dark energy coupling with electromagnetism as seen from future low-medium redshift probes

et al. 2014

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“…The assumption of a coupled dark energy model can change significantly the CMB constraints on the Hubble parameter (see e.g. [8][9][10][11]). In particular, if coupled models are fitted to a (wrong) ΛCDM cosmology, the reconstructed H 0 from CMB will be shifted from its real value [12].…”

Section: Introductionmentioning

confidence: 99%

New constraints on coupled dark energy from the Planck satellite experiment

et al. 2013

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We present new constraints on coupled dark energy from the recent measurements of the Cosmic Microwave Background Anisotropies from the Planck satellite mission. We found that a coupled dark energy model is fully compatible with the Planck measurements, deriving a weak bound on the dark matter-dark energy coupling parameter ξ = −0.49−0.31 at 68% c.l.. Moreover if Planck data are fitted to a coupled dark energy scenario, the constraint on the Hubble constant is relaxed to H0 = 72.1 +3.2 −2.3 km/s/Mpc, solving the tension with the Hubble Space Telescope value. We show that a combined Planck+HST analysis provides significant evidence for coupled dark energy finding a non-zero value for the coupling parameter ξ, with −0.90 < ξ < −0.22 at 95% c.l.. We also consider the combined constraints from the Planck data plus the BAO measurements of the 6dF Galaxy Survey, the Sloan Digital Sky Survey and the Baron Oscillation Spectroscopic Survey.PACS numbers: 98.80. Es, 98.80.Jk, 95.30.Sf

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“…Various choices of couplings have been investigated in literature [12][13][14][30][31][32][33][34][35][36]. Analysis of the models and constraint on these couplings have been obtained in several ways, including spherical collapse ( [37,38] and references therein), time renormalizazion group [39], N -body simulations [17,40,41] and effects on supernovae, CMB and crosscorrelation of CMB and LSS [7,9,[19][20][21][22][42][43][44]. Refs.…”

Section: Coupled Dark Energymentioning

confidence: 99%

“…Several works have been devoted to forecasting future constraints with future wide surveys and a small selection of the recent ones can be found in Ref. [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Testing coupled dark energy with next-generation large-scale observations

et al. 2012

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Coupling dark energy to dark matter provides one of the simplest way to effectively modify gravity at large scales without strong constraints from local (i.e. solar system) observations. Models of coupled dark energy have been studied several times in the past and are already significantly constrained by cosmic microwave background experiments. In this paper we estimate the constraints that future large-scale observations will be able to put on the coupling and in general on all the parameters of the model. We combine cosmic microwave background, tomographic weak lensing, redshift distortions and power spectrum probes. We show that next-generation observations can improve the current constraint on the coupling to dark matter by two orders of magnitude; this constraint is complementary to the current solar-system bounds on a coupling to baryons.

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Future weak lensing constraints in a dark coupled universe

Cited by 37 publications

References 74 publications

Dark energy coupling with electromagnetism as seen from future low-medium redshift probes

Dark energy coupling with electromagnetism as seen from future low-medium redshift probes

New constraints on coupled dark energy from the Planck satellite experiment

Testing coupled dark energy with next-generation large-scale observations

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