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- W2062448144 abstract "The dynamical effect of the cosmological constant $Lambda$ 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 $Omega_{circ}sim 0.3$, $Lambda$-effect on the kinematics intervenes significantly by amplifying the expansion rate at redshift $zsim 1.7$. As a result, the size increases with the background density and with $Lambda$, what interprets by the gravitational attraction of borders from outside regions and the gravitational repulsion of borders. The velocity flow within the void region depends solely on $Lambda$, it reads $vec{v}=sqrt{Lambda/3}vec{r}$. Hence, the empty regions are swept out for spatially closed Friedmann models what provides us with a stability criterion." @default.
- W2062448144 created "2016-06-24" @default.
- W2062448144 creator A5001536375 @default.
- W2062448144 creator A5006045539 @default.
- W2062448144 date "2010-11-17" @default.
- W2062448144 modified "2023-09-25" @default.
- W2062448144 title "Λ effect in the cosmological expansion of void" @default.
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- W2062448144 doi "https://doi.org/10.1088/1475-7516/2010/11/022" @default.
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