Bibcode
Luridiana, V.; Peimbert, M.; Peimbert, A.
Referencia bibliográfica
Revista Mexicana de Astronomía y Astrofísica Vol. 52, pp. 419--424 (2016)
Advertised on:
10
2016
Número de citas
86
Número de citas referidas
70
Descripción
Based on observations of HII regions and on the new
computations of the recombination coefficients of the HeI
lines by Porter el al. we obtain a primordial helium abundance by mass
of Y_P = 0.2446 ± 0.0029. We consider thirteen sources of error
for the Y_P determination; some of them are mainly due to systematic
effects, while the rest are mainly due to statistical effects. We
compare our results with other determinations of Y_P present in the
literature. Combining our Y_P value with computations of primordial
nucleosynthesis we find a number of neutrino species
{N_{eff}=2.90± 0.22}, and a neutron mean life
τ_{ν}=872± 14s.