# Reexamining the constraint on the helium abundance from the CMB

@article{Ichikawa2006ReexaminingTC, title={Reexamining the constraint on the helium abundance from the CMB}, author={Kazuhide Ichikawa and Tomo Takahashi}, journal={Physical Review D}, year={2006}, volume={73}, pages={063528} }

We revisit the constraint on the primordial helium mass fraction ${Y}_{p}$ from observations of cosmic microwave background (CMB) alone. By minimizing ${\ensuremath{\chi}}^{2}$ of recent CMB experiments over 6 other cosmological parameters, we obtained rather weak constraints as $0.17\ensuremath{\le}{Y}_{p}\ensuremath{\le}0.52$ at $1\ensuremath{\sigma}$ C.L. for a particular data set. We also study the future constraint on cosmological parameters when we take account of the prediction of the…

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## References

SHOWING 1-10 OF 73 REFERENCES

Primordial nucleosynthesis for the new cosmology: Determining uncertainties and examining concordance

- Physics
- 2004

Big bang nucleosynthesis (BBN) and the cosmic microwave background (CMB) have a long history together in the standard cosmology. The general concordance between the predicted and observed light…

The impact of an extra background of relativistic particles on the cosmological parameters derived from the cosmic microwave background

- Physics
- 2001

Recent estimates of cosmological parameters derived from cosmic microwave background (CMB) anisotropies are based on the assumption that we know the precise amount of energy density in relativistic…

Cosmological parameters from CMB and other data: A Monte Carlo approach

- Physics
- 2002

We present a fast Markov chain Monte Carlo exploration of cosmological parameter space. We perform a joint analysis of results from recent cosmic microwave background ~CMB! experiments and provide…

Precision Detection of the Cosmic Neutrino Background

- Physics
- 1999

In the standard big bang cosmology the canonical value for the ratio of relic neutrinos to cosmic microwave background (CMB) photons is 9/11. Within the framework of the standard model of particle…

What is the lowest possible reheating temperature

- Physics
- 2004

We study models in which the universe exits reheating at temperatures in the MeV regime. By combining light element abundance measurements with cosmic microwave background and large scale structure…

Updated Big Bang nucleosynthesis confronted to WMAP observations and to the abundance of light elements

- Physics
- 2003

We improve Standard Big Bang Nucleosynthesis (SBBN) calculations taking into account new nuclear physics analyses (Descouvemont et al. 2003). Using a Monte-Carlo technique, we calculate the…

Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectra

- Physics
- 2003

We present the temperature and polarization angular power spectra of the cosmic microwave background (CMB) derived from the first 5 years of WMAP data. The 5-year temperature (TT) spectrum is cosmic…

Present status of primordial nucleosynthesis after WMAP: results from a new BBN code

- Physics
- 2003

We report on the status of primordial nucleosynthesis in light of recent results on CMB anisotropies from WMAP experiment. Theoretical estimates for nuclei abundances, along with the corresponding…

A Measurement of the Angular Power Spectrum of the CMB Temperature Anisotropy from the 2003 Flight of BOOMERANG

- Physics
- 2006

We report on observations of the cosmic microwave background (CMB) obtained during the 2003 January flight of BOOMERANG. These results are derived from 195 hr of observation with four 145 GHz…

Weighing the universe with the cosmic microwave background.

- Physics, MedicinePhysical review letters
- 1996

This work evaluates the precision with which Ω can be determined by a CMB map as a function of sky coverage, pixel noise, and beam size.