Constraining the Dark Universe

Abstract

We combine complementary datasets to constrain dark energy. Using standard Big Bang Nucleosynthesis and the observed abundances of primordial nuclides to put constraints on ${\Omega }_Q$ at temperatures near $T\sim 1MeV$, we find the strong constraint ${\Omega }_Q(MeV)<0.045$ at $2\sigma$ c.l.. Under the assumption of flatness, using results from Cosmic Microwave Background (CMB) anisotropy measurements, high redshift supernovae (SN-Ia) observations and data from local cluster abundances we put a new constraint on the equation of state parameter $w_Q<-0.85$ at 68% c.l..

5 pages, 3 figures, new reference added. To appear in the proceedings of TAUP 2001 (7th international workshop on Topics in Astroparticle and Underground Physics), Sep 2001, Laboratori Nazionali del Gran Sasso, Assergi, Italy

References in corpus (3)

• Cosmology and the Fate of Dilatation Symmetry
• Early-universe constraints on a Primordial Scaling Field
• From Anisotropy to Omega

Cited by in corpus (20)

• Effects of the Sound Speed of Quintessence on the Microwave Background and Large Scale Structure
• Dynamics of Quintessence Models of Dark Energy with Exponential Coupling to the Dark Matter
• Kination Dominated Reheating and Cold Dark Matter Abundance
• Quintessential Kination and Cold Dark Matter Abundance
• Exponential Potentials for Tracker Fields
• Nonlinear multidimensional cosmological models with form fields: stabilization of extra dimensions and the cosmological constant problem
• Fine Tuning in Quintessence Models with Exponential Potentials
• Initial conditions for quintessence after inflation
• Observational constraints on varying neutrino-mass cosmology
• Cosmology with exponential potentials
• Slinky Inflation
• Undulant Universe
• Hořava-Lifshitz cosmology in light of new data
• Cosmological Acceleration Through Transition to Constant Scalar Curvature
• Exact Scaling Solutions in Normal and Brans-Dicke Models of Dark Energy
• Cosmology from String Theory
• Quintessence Model and Observational Constraints
• Evolution of density perturbations in double exponential quintessence models
• Numerical solutions to the cosmological 3-fluid problem
• Manifestations of String Theory in Astrophysical Data and at the LHC