Complementary constraints on non-standard cosmological models from CMB and BBN

Abstract

We study metric-affine gravity (MAG) inspired cosmological models. Those models were statistically estimated using the SNIa data. We also use the cosmic microwave background observations and the big-bang nucleosynthesis analysis to constrain the density parameter ${\Omega }_{\psi ,0}$ which is related to the non-Riemannian structure of the underlying spacetime. We argue that while the models are statistically admissible from the SNIa analysis, complementary stricter limits obtained from the CMB and BBN indicate that the models with density parameters with a $a^{-6}$ scaling behaviour are virtually ruled out. If we assume the validity of the particular MAG based cosmological model throughout all stages of the Universe, the parameter estimates from the CMB and BBN put a stronger limit, in comparison to the SNIa data, on the presence of non-Riemannian structures at low redshifts.

RevTeX4, 6 pages, 2 figures; references added, matches PLB accepted version

Cited by in corpus (10)

• Primordial Nucleosynthesis: from precision cosmology to fundamental physics
• Observational constraints on low redshift evolution of dark energy: How consistent are different observations?
• Top ten accelerating cosmological models
• Which cosmological models -- with dark energy or modified FRW dynamics?
• Classical big-bounce cosmology: dynamical analysis of a homogeneous and irrotational Weyssenhoff fluid
• Charged Wormhole Solutions in Einstein-Cartan gravity
• Can the initial singularity be detected by cosmological tests?
• Testing and selection of cosmological models with $(1+z{)}^6$ corrections
• Cosmological zoo -- accelerating models with dark energy
• Does space-time torsion determine the minimum mass of gravitating particles?