The primordial Helium abundance

Bibcode
2003como.conf..159L
Luridiana, V.
Bibliographical reference

The cosmological model, proceedings of the XXXVIIth Rencontres de Moriond, Edited by Y. Giraud-Héraud, C. Magneville, J. Tran Thanh Van, The Gioi Publishers (Vietnam), 159, 2003.

Advertised on:
10
2003
Number of authors
1
IAC number of authors
0
Citations
8
Refereed citations
3
Description
The primordial abundance of 4He, YP, is one of the hottest themes in present-day astronomy, mostly due to its cosmological relevance. The disagreement between different determinations has been currently reduced to the 1-2% level, but these differences are still large enough to have deep implications for Big-Bang nucleosynthesis. It is therefore crucial to estimate precisely the uncertainties involved in the measurement of YP. Here, I review the methods used in the determination of YP and the related uncertainties. I also discuss some recent results, and emphasize the assumptions underlying the differences among them.
Type
Non-refereed
Galaxies
Cosmological parameters
Early universe

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