The Radiation Budget of the Universe

Journal Article · Wed Nov 24 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3527243· OSTI ID:21506885

Caramete, Ana ^[1]

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1. Institute for Space Sciences, Bucharest (Romania)

This work sets bounds on the radiation content of the Universe and neutrino properties by using the WMAP-7 year CMB measurements complemented with most of the existing CMB and LSS data, imposing also self-consistent BBN constraints on the primordial helium abundance, Yp. Lepton asymmetric cosmological models are considered, parametrized by the neutrino degeneracy parameter {xi}{sub {nu}} and the variation of the relativistic degrees of freedom, {Delta}N{sub eff}{sup oth}, due to possible other physical processes occurred between BBN and structure formation epochs. The results bring an important improvement over the same parameters obtained by using the WMAP data alone, showing that the LSS measurements are useful tools in constraining the radiation content of the Universe during BBN.

• OSTI ID: 21506885
• Journal Information: AIP Conference Proceedings, Vol. 1304, Issue 1; Conference: Carpathian summer school of physics - Exotic nuclei and nuclear/particle astrophysics (III): From nuclei to stars, Sinaia (Romania), 20 Jun - 3 Jul 2010; Other Information: DOI: 10.1063/1.3527243; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASYMMETRY
BOSONS
COSMIC RADIATION
COSMOLOGICAL MODELS
DEGREES OF FREEDOM
HELIUM
IONS
NEUTRINOS
NUCLEOSYNTHESIS
RADIOWAVE RADIATION
RECOMBINATION
RELATIVISTIC RANGE
RELICT RADIATION
UNIVERSE
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
FLUIDS
GASES
IONIZING RADIATIONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MICROWAVE RADIATION
NONMETALS
RADIATIONS
RARE GASES
SYNTHESIS