Published August 15, 2008 | Version v1
Journal article Metadata-only

Primordial helium abundance from CMB: A constraint from recent observations and a forecast

Creators

  • 1. Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT (United Kingdom)
  • 2. Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582 (Japan)
  • 3. Department of Physics, Saga University, Saga 840-8502 (Japan)

Description

We studied a constraint on the primordial helium abundance Yp from current and future observations of CMB. Using the currently available data from WMAP, ACBAR, CBI, and BOOMERANG, we obtained the constraint as Yp=0.25-0.07+0.10 at 68% confidence level. We also provide a forecast for the Planck experiment using the Markov chain Monte Carlo approach. In addition to forecasting the constraint on Yp, we investigate how assumptions for Yp affect constraints on the other cosmological parameters.

Additional details

Identifiers

DOI
10.1103/PhysRevD.78.043509;
arXiv
arXiv:0712.4327v2;

Publishing Information

Journal Title
Physical Review. D, Particles Fields
Journal Volume
78
Journal Issue
4
Journal Page Range
p. 043509-043509.10
ISSN
0556-2821
CODEN
PRVDAQ

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
41001786
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
ABUNDANCE; COSMOLOGICAL MODELS; FORECASTING; HELIUM; MARKOV PROCESS; MONTE CARLO METHOD; RELICT RADIATION; SIMULATION
Descriptors DEC
CALCULATION METHODS; ELECTROMAGNETIC RADIATION; ELEMENTS; FLUIDS; GASES; MATHEMATICAL MODELS; MICROWAVE RADIATION; NONMETALS; RADIATIONS; RARE GASES; STOCHASTIC PROCESSES

Optional Information

Notes
(c) 2008 The American Physical Society