New Dark Energy Constraints from Supernovae, Microwave Background, and Galaxy Clustering

Wang, Yun; Tegmark, Max

doi:10.1103/physrevlett.92.241302

Cited by 259 publications

(302 citation statements)

References 40 publications

Supporting

Mentioning

286

Contrasting

Order By: Relevance

“…This sample includes 9 SNe Ia at z > 1, and appears to have systematic effects from weak lensing, or another effect that mimics weak lensing qualitatively. This would bias the distance estimates somewhat without flux averaging [27,28], and so we use it on these SNe [29].…”

Section: Observational Datamentioning

confidence: 99%

Present and future evidence for evolving dark energy

et al. 2006

Self Cite

View full text Add to dashboard Cite

We compute the Bayesian evidences for one-and two-parameter models of evolving dark energy, and compare them to the evidence for a cosmological constant, using current data from Type Ia supernova, baryon acoustic oscillations, and the cosmic microwave background. We use only distance information, ignoring dark energy perturbations. We find that, under various priors on the dark energy parameters, CDM is currently favored as compared to the dark energy models. We consider the parameter constraints that arise under Bayesian model averaging, and discuss the implication of our results for future dark energy projects seeking to detect dark energy evolution. The model selection approach complements and extends the figure-of-merit approach of the Dark Energy Task Force in assessing future experiments, and suggests a significantly-modified interpretation of that statistic.

show abstract

Section: Observational Datamentioning

confidence: 99%

Present and future evidence for evolving dark energy

et al. 2006

Self Cite

View full text Add to dashboard Cite

show abstract

“…This region of the plane corresponds to phantom models [21] which have unusual properties and may have very different consequences for the fate of the Universe (e.g. models with w 1 > w 0 + 1 will end in a Big Rip [17]). Models with very exotic w(z) may come from modified gravity [22].…”

Section: Revisited Conclusion On Existing Datamentioning

confidence: 99%

“…• Large positive variations in time of the equation of state are excluded (at 95%CL) since the dark energy density blows up as e 3w1z [17].…”

Section: Revisited Conclusion On Existing Datamentioning

confidence: 99%

Probing dark energy with supernovae: A concordant or a convergent model?

et al. 2004

View full text Add to dashboard Cite

We present a revised interpretation of recent analysis of supernovae data. We evaluate the effect of the priors on the extraction of the dark energy equation of state. We find that the conclusions depend strongly on the Ω M prior value and on its uncertainty, and show that a biased fitting procedure applied on non concordant simulated data can converge to the "concordance model". Relaxing the prior on Ω M points to other sets of solutions, which are not excluded by observational data.

show abstract

“…where p x and ρ x stand for the dark energy pressure and energy density, respectively (see also Wang 2001;Watson & Scherrer 2003;Corasaniti et al 2004;Johri 2004;Wang & Tegmark 2004;Jassal et al 2005;Barboza & Alcaniz 2008, for other EoS parameterizations). The analyses are performed using one the most recent type Ia supernovae (SNe Ia) observations, namely the nearby + SDSS + ESSENCE + SNLS + Hubble Space Telescope (HST) set of 288 SNe Ia discussed in Kessler et al (2009) (which we refer to as the SDSS compilation).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics and dark energy

Silva

Gonçalves

Alcaniz

et al. 2011

A&A

View full text Add to dashboard Cite

Significant observational effort has been directed to unveiling the nature of the so-called dark energy. However, given the large number of theoretical possibilities, it is possible that this a task cannot be based only on observational data. We discuss some thermodynamic properties of this energy component assuming a general time-dependent equation-of-state parameter w(z) = w 0 + w a f (z), where w 0 and w a are constants and f (z) may assume different forms. We show that very restrictive bounds can be placed on the w 0 -w a space when current observational data are combined with the thermodynamic constraints derived.

show abstract

New Dark Energy Constraints from Supernovae, Microwave Background, and Galaxy Clustering

Cited by 259 publications

References 40 publications

Present and future evidence for evolving dark energy

Present and future evidence for evolving dark energy

Probing dark energy with supernovae: A concordant or a convergent model?

Thermodynamics and dark energy

Contact Info

Product

Resources

About