The primordial Helium abundance

Bibcode
2003como.conf..159L
Luridiana, V.
Referencia bibliográfica

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.

Fecha de publicación:
10
2003
Número de autores
1
Número de autores del IAC
0
Número de citas
8
Número de citas referidas
3
Descripción
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.
Tipo
Sin árbitro
Galaxias
Parámetros cosmológicos
Universo temprano

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