BBN And CMB Constraints On Dark Energy

Abstract

Current observational data favor cosmological models which differ from the standard model due to the presence of some form of dark energy and, perhaps, by additional contributions to the more familiar dark matter. Primordial nucleosynthesis provides a window on the very early evolution of the universe and constraints from Big Bang Nucleosynthesis (BBN) can bound the parameters of models for dark matter/energy at redshifts of order ten billion. The spectrum of temperature fluctuations imprinted on the Cosmic Microwave Background (CMB) radiation opens a completely different window on the universe at epochs from redshifts of order ten thousand to nearly the present. The CMB anisotropy spectrum provides constraints on new physics which are independent of, and complementary to those from BBN. Here we consider three classes of models for the dark matter/energy: extra particles which were relativistic during the early evolution of the universe (X); Quintessence models involving a minimally-coupled scalar field (Q); models with a non-minimally coupled scalar field which modify the strength of gravity during the early evolution of the universe (G). We constrain the parameters of these models using data from BBN and the CMB and identify the allowed regions in their parameter spaces consistent with the more demanding joint BBN and CMB constraints. For X and Q such consistency is relatively easy to find; it is more difficult for the G models with an inverse power law potential for the scalar field.

REVTEX4. 17 pages, 7 figures. Replaced with version to be published in PRD

References in corpus (3)

• Sensitivity of the Cosmic Microwave Background Anisotropy to Initial Conditions in Quintessence Cosmology
• Halo Concentrations and Weak-Lensing Number Counts in Dark Energy Cosmologies
• Big Bang Nucleosynthesis Constraints on Brane Cosmologies

Cited by in corpus (30)

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• Primordial Nucleosynthesis: from precision cosmology to fundamental physics
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• Primordial Nucleosynthesis: Successes And Challenges
• Tracking solutions in tachyon cosmology
• Effective number of neutrinos and baryon asymmetry from BBN and WMAP
• Probing Physics Beyond the Standard Model: Limits from BBN and the CMB Independently and Combined
• Big bang nucleosynthesis constraints on scalar-tensor theories of gravity
• BBN For Pedestrians
• Quasi-local variables in spherical symmetry: numerical applications to dark matter and dark energy sources
• Coincidence Problem in YM Field Dark Energy Model
• Non-universal scalar-tensor theories and big bang nucleosynthesis
• Constraints on extended quintessence from high-redshift Supernovae
• Dark energy, gravitation and supernovae
• Chaotic scalar fields as models for dark energy
• Cosmological Constraints on Unparticles as Continuous Mass Scalars
• The Effect of Bound Dineutrons upon BBN
• BBN and Lambda_QCD
• Do Fermions and Bosons Produce the Same Gravitational Field?
• Emergent dark energy from unparticles
• Inverse Power Law Quintessence with Non-Tracking Initial Conditions
• Possible evidence for "dark radiation" from Big Bang Nucleosynthesis Data
• Simplified Quartessence Cosmology
• Cosmic microwave background constraints on the strong equivalence principle
• Cosmology of fermionic dark matter
• Constraining primordial black hole masses through $f(R)$ gravity scalarons in Big Bang Nucleosynthesis
• Slow-Roll Inflation in the Presence of a Dark Energy Coupling
• Implications to CMB from Model Independent evolution of w and Late Time Phase Transition