Huge Void Center:
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2 5 Se p 20 09 Supernovae as seen by off - center observers in a local void
Inhomogeneous universe models have been proposed as an alternative explanation for the apparent acceleration of the cosmic expansion that does not require dark energy. In the simplest class of inhomogeneous models, we live within a large, spherically symmetric void. Several studies have shown that such a model can be made consistent with many observations, in particular the redshift–luminosity ...
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The dynamical effect of the cosmological constant Λ on a single spherical void evolving in a the universe is investigated within a non linear perturbation of Newton-Friedmann models. The void expands with a huge initial burst which freezes asymptotically with time up to matching Hubble flow. For Ω◦ ∼ 0.3, Λ-effect on the kinematics intervenes significantly by amplifying the expansion rate at re...
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The dynamical effect of the cosmological constant Λ on a single spherical void evolving in a Friedmann-Lemâıtre universe is investigated within a non linear perturbation of Newton-Friedmann models. The void expansion shows a huge initial burst, which freezes asymptotically up to match Hubble expansion. Λ-effect on the kinematics intervenes significantly by amplifying the expansion rate at redsh...
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