Solving the Inverse Problem with Inhomogeneous Universes (2008)
Yoo, Chul-Moon, Kai, Tomohiro, Nakao, Ken-ichi
We construct the Lema\^itre-Tolman-Bondi (LTB) dust universe whose distance-redshift relation is equivalent to that in the concordance $\Lambda$ cold dark matter ($\Lambda$CDM) cosmological model. In...
Can inhomogeneties accelerate the cosmic volume expansion? (2006)
Kai, Tomohiro, Kozaki, Hiroshi, Nakao, Ken-ichi, Nambu, Yasusada, Yoo, Chul-Moon
If expanding and contracting regions coexist in the universe, the speed of the cosmic volume expansion can be accelerated. We construct simple inhomogeneous dust-filled universe models in which the...