Fleury, Dupuy, & Uzan reported in Phys. Lett. (2013), that it is possible to interpret the Hubble diagram in the context of nonhomogeneous universe. They wrote as follows:
"In the standard cosmological framework, the Hubble diagram is interpreted by assuming that the light emitted by standard candles propagates in a spatially homogeneous and isotropic spacetime. However, the light from "point sources"--such as supernovae--probes the Universe on scales where the homogeneity principle is no longer valid. Inhomogeneities are expected to induce a bias and a dispersion of the Hubble diagram. This is investigated by considering a Swiss-cheese cosmological model, which (1) is an exact solution of the Einstein field equations, (2) is strongly inhomogeneous on small scales, but (3) has the same expansion history as a strictly homogeneous and isotropic universe. By simulating Hubble diagrams in such models, we quantify the influence of inhomogeneities on the measurement of the cosmological parameters. Though significant in general, the effects reduce drastically for a universe dominated by the cosmological constant."
So do you think that Swiss-chess model can be made close to observation? What do you think?
http://arxiv.org/abs/1302.5308
Yes, because the universe is inhomogeneous. At any scale in different areas of the same volume contains a different number of light matter, dark matter and vacuum energy. But I guess with the growth of scale a change in the relative densities of these kinds of matter must decrease, but not necessarily to zero.
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Да, потому что вселенная неоднородна. На любом ее масштабе в разных областях одинакового объема содержится разное количество светлого вещества, темной материи и энергии вакуума. Но, полагаю, с ростом масштаба изменение относительных плотностей этих видов материи должно уменьшаться, но не обязательно до нуля.
@Alexander: Thanks for your comments.
@Mohamed: thanks, yes I have read at a glance your paper, but as far as I know, your paper does not discuss light emitted by standard candles. Your further comments are welcome. thanks
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