Journals Information

Universal Journal of Physics and Application Vol. 8(6), pp. 310 - 319
DOI: 10.13189/ujpa.2014.020605
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A New Vision of the Big Bang Cosmology


Paulo Aguiar 1,2,*
1 Centro de Astronomia e Astrofisica da Universidade de Lisboa Campo Grande, Ed. C8; 1749-016 Lisboa, Portugal
2 Universidade Lusiada do Porto Rua Dr. Lopo de Carvalho, 4369-006 Porto, Portugal

ABSTRACT

In this paper we show how the inhomogeneity in the matter distribution produced until the time of the last scattering surface in the light of some spatially homogeneous but anisotropic models, produced anisotropies that on large angular scales (larger than ϑ2。) not differ from those considered in Friedmann-Lemaitre-Robertson-Walker (FLRW) geometries. For these anisotropic models the mark left in the cosmic microwave background radiation by fluctuations density primordial, in the form of a fractional variation of temperature of this radiation, is governed by the same expression which is used for FLRW models. More specifically, under adiabatic initial conditions, the classical Sachs-Wolfe effect is recovered, since the anisotropy of the global expansion is small at the time of the last scattering surface. This conclusion is in agreement with previous work on the same anisotropic models, where they undergo a process of ‘isotropization’ to the extent that the observations are unable to distinguish them from the FLRW models, if the Hubble parameters along the orthogonal directions are assumed approximately equal to the current present epoch. We considered upper bounds for the current values of the anisotropic parameters imposed by COBE observations.

KEYWORDS
Anisotropy, CMBR

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Paulo Aguiar , "A New Vision of the Big Bang Cosmology," Universal Journal of Physics and Application, Vol. 8, No. 6, pp. 310 - 319, 2014. DOI: 10.13189/ujpa.2014.020605.

(b). APA Format:
Paulo Aguiar (2014). A New Vision of the Big Bang Cosmology. Universal Journal of Physics and Application, 8(6), 310 - 319. DOI: 10.13189/ujpa.2014.020605.