Galactic periodicity and the oscillating G model
Por:
Salgado M., Sudarsky D., Quevedo H.
Publicada:
1 ene 1996
Resumen:
We consider the model involving the oscillation of the effective gravitational constant that has been put forward in an attempt to reconcile the observed periodicity in the galaxy number distribution with the standard cosmological models. This model involves a highly nonlinear dynamics which we analyze numerically. We carry out a detailed study of the bound that nucleosynthesis imposes on this model. The analysis shows that for any assumed value for O (the total energy density) one can fix the value of Obar (the baryonic energy density) in such a way as to accommodate the observational constraints coming from the 4He primordial abundance. In particular, if we impose the inflationary value O=1 the resulting baryonic energy density turns out to be Obar0.021. This result lies in the very narrow range 0.016=Obar=0.026 allowed by the observed values of the primordial abundances of the other light elements. The remaining fraction of O corresponds to dark matter represented by a scalar field. © 1996 The American Physical Society.
Filiaciones:
Salgado M.:
Departamento de Gravitación, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Teoría de Campos, Apdo. Postal 70-543, México, 04510 D.F, Mexico
Sudarsky D.:
Departamento de Gravitación, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Teoría de Campos, Apdo. Postal 70-543, México, 04510 D.F, Mexico
Quevedo H.:
Departamento de Gravitación, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Teoría de Campos, Apdo. Postal 70-543, México, 04510 D.F, Mexico
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