Confronting quintessence models with recent high-redshift supernovae data

Barro, Guillermo; Maroto, Antonio L.

doi:10.1103/physrevd.74.083519

Cited by 9 publications

(9 citation statements)

References 55 publications

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“…Table 2 gives allowed values of all cosmological parameters at 95 per cent confidence level by SNLS, WMAP as well as the combined data set. For the cases where a similar analysis has been done by others, our results are consistent with other findings (Bridle et al 2003; Spergel et al 2003; Maccio et al 2004; Linder & Jenkins 2003; Pogosyan, Bond & Contaldi 2003; Tegmark et al 2004; Wang & Tegmark 2004; Giovi, Baccigalupi & Perrotta 2005; Hannestad 2004; Huterer & Cooray 2005; Lee 2005; Lee & Ng 2003; Lee, Lee & Ng 2005; Mainini, Colombo & Bonometto 2005; Rapetti, Allen & Weller 2005; Pogosian 2005; Nesseris & Perivolaropoulos 2006; Seljak et al 2005; Shen et al 2005; Feng, Wang & Zhang 2005; Xia et al 2006a,b; Amendola, Campos & Rosenfeld 2007; Calvo & Maroto 2006; Carneiro et al 2006; Dantas et al 2007; Elizalde et al 2008; Mota et al 2007).…”

Section: Discussionsupporting

confidence: 92%

Understanding the origin of CMB constraints on dark energy

Jassal¹,

Bagla²,

Padmanabhan³

2010

Monthly Notices of the Royal Astronomical Society

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We study the observational constraints of cosmic microwave background (CMB) temperature and polarization anisotropies on models of dark energy, with special focus on models with variation in properties of dark energy with time. We demonstrate that the key constraint from CMB observations arises from the location of acoustic peaks. An additional constraint arises from the limits on ΩNR from the relative amplitudes of acoustic peaks. Further, we show that the distance to the last scattering surface is not how the CMB observations constrain the combination of parameters for models of dark energy. We also use constraints from supernova observations and show that unlike the gold and silver samples, the Supernova Legacy Survey (SNLS) sample prefers a region of parameter space that has a significant overlap with the region preferred by the CMB observations. This is a verification of a conjecture made by us in an earlier work. We discuss combined constraints from Wilkinson Microwave Anisotropy Probe 5‐yr and SNLS observations. We find that models with w≃− 1 are preferred for models with a constant equation‐of‐state parameters. In case of models with a time‐varying dark energy, we show that constraints on evolution of dark energy density are almost independent of the type of variation assumed for the equation‐of‐state parameter. This makes it easy to get approximate constraints from CMB observations on arbitrary models of dark energy. Constraints on models with a time‐varying dark energy are predominantly due to CMB observations, with supernova constraints playing only a marginal role.

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Section: Discussionsupporting

confidence: 92%

Understanding the origin of CMB constraints on dark energy

Jassal¹,

Bagla²,

Padmanabhan³

2010

Monthly Notices of the Royal Astronomical Society

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“…Interestingly, as shown in [19], the value α = 3, which coincides with the model we have derived, remains consistent with supernovae data. However, the symmetry breaking field V a has non-trivial coupling to matter [14] which becomes important whenever dV 2 is significantly different from zero.…”

Section: A Specific Examplesupporting

confidence: 91%

Exploring Cartan gravity with dynamical symmetry breaking

Westman¹,

Złośnik²

2014

Class. Quantum Grav.

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It has been known for some time that General Relativity can be regarded as a Yang-Mills-type gauge theory in a symmetry broken phase. In this picture the gravity sector is described by an SO(1, 4) or SO(2, 3) gauge field A a bµ and Higgs field V a which acts to break the symmetry down to that of the Lorentz group SO(1, 3). This symmetry breaking mirrors that of electroweak theory. However, a notable difference is that while the Higgs field Φ of electroweak theory is taken as a genuine dynamical field satisfying a Klein-Gordon equation, the gauge independent norm V 2 ≡ η ab V a V b of the Higgs-type field V a is typically regarded as non-dynamical. Instead, in many treatments V a does not appear explicitly in the formalism or is required to satisfy V 2 = const. = 0 by means of a Lagrangian constraint. As an alternative to this we propose a class of polynomial actions that treat both the gauge connection A a bµ and Higgs field V a as genuine dynamical fields with no ad hoc constraints imposed. The resultant equations of motion consist of a set of first-order partial differential equations. We show that for certain actions these equations may be cast in a second-order form, corresponding to a scalar-tensor model of gravity. One simple choice leads to the extensively studied Peebles-Ratra rolling quintessence model. Another choice yields a scalar-tensor symmetry broken phase of the theory with positive cosmological constant and an effective mass M of the gravitational Higgs field ensuring the constancy of V 2 at low energies and agreement with empirical data if M is sufficiently large. More general cases are discussed corresponding to variants of Chern-Simons modified gravity and scalar-Euler form gravity, each of which yield propagating torsion.

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“…Since these two data sets were obtained with different detection techniques and use different methods to extract the distance moduli of the supernovae, we will analyze them separately. Other recent analysis can be found in [11,[29][30][31].…”

Section: Resultsmentioning

confidence: 96%

Consequences of dark matter-dark energy interaction on cosmological parameters derived from type Ia supernova data

2007

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Models where the dark matter component of the Universe interacts with the dark energy field have been proposed as a solution to the cosmic coincidence problem, since in the attractor regime both dark energy and dark matter scale in the same way. In these models the mass of the cold dark matter particles is a function of the dark energy field responsible for the present acceleration of the Universe, and different scenarios can be parametrized by how the mass of the cold dark matter particles evolves with time. In this article we study the impact of a constant coupling between dark energy and dark matter on the determination of a redshift dependent dark energy equation of state w DE z and on the dark matter density today from SNIa data. We derive an analytical expression for the luminosity distance in this case. In particular, we show that the presence of such a coupling increases the tension between the cosmic microwave background data from the analysis of the shift parameter in models with constant w DE and SNIa data for realistic values of the present dark matter density fraction. Thus, an independent measurement of the present dark matter density can place constraints on models with interacting dark energy.

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Confronting quintessence models with recent high-redshift supernovae data

Cited by 9 publications

References 55 publications

Understanding the origin of CMB constraints on dark energy

Understanding the origin of CMB constraints on dark energy

Exploring Cartan gravity with dynamical symmetry breaking

Consequences of dark matter-dark energy interaction on cosmological parameters derived from type Ia supernova data

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