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• W1970366974 startingPage "155002" @default.
• W1970366974 abstract "We build an exact inhomogeneous universe composed of a central flat Friedmann zone up to a small redshift z1, a thick shell made of anisotropic matter and a hyperbolic Friedmann metric up to the scale where dimming galaxies are observed (z ≃ 1.7) that can be matched to a hyperbolic Lemaître–Tolman–Bondi spacetime to best fit the WMAP data at early epochs. We construct a general framework which permits us to consider a non-uniform clock rate for the universe. As a result, for both a uniform time and a uniform Hubble flow, the deceleration parameter extrapolated by the central observer is always positive. Nevertheless, by taking a non-uniform Hubble flow, it is possible to obtain a negative central deceleration parameter that, with certain parameter choices, can be made the one observed currently. Finally, it is conjectured as a possible physical mechanism to justify a non-uniform time flow." @default.
• W1970366974 created "2016-06-24" @default.
• W1970366974 creator A5040201278 @default.
• W1970366974 date "2010-06-11" @default.
• W1970366974 modified "2023-09-23" @default.
• W1970366974 title "An inhomogeneous universe with thick shells and without a cosmological constant" @default.
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• W1970366974 doi "https://doi.org/10.1088/0264-9381/27/15/155002" @default.
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