20 citations · 44 across the 7 of their papers we have counts for
4 papers · 1 filter
Systematic error due to isotropic inhomogeneities
Hiroyuki Negishi, Ken-ichi Nakao, Chul-Moon Yoo +1
Usually the effects of isotropic inhomogeneities are not seriously taken into account in the determination of the cosmological parameters because of Copernican principle whose stat…
Comparison of two approximation schemes for solving perturbations in a LTB cosmological model
Ryusuke Nishikawa, Ken-ichi Nakao, Chul-Moon Yoo
Recently, the present authors studied perturbations in the Lemaitre-Tolman-Bondi cosmological model by applying the second-order perturbation theory in the dust Friedmann-Lemaitre-…
Two-point correlation function of density perturbations in a large void universe
Ryusuke Nishikawa, Chul-Moon Yoo, Ken-ichi Nakao
We study the two-point correlation function of density perturbations in a spherically symmetric void universe model which does not employ the Copernican principle. First we solve p…
Evolution of density perturbations in large void universe
Ryusuke Nishikawa, Chul-Moon Yoo, Ken-ichi Nakao
We study the evolution of linear density perturbations in a large spherical void universe which accounts for the acceleration of the cosmic volume expansion without introducing dar…