23 citations · 63 across the 5 of their papers we have counts for
5 papers
How Do Nonlinear Voids Affect Light Propagation ?
Norimasa Sugiura, Ken-ichi Nakao, Daisuke Ida +2
Propagation of light in a clumpy universe is examined. As an inhomogeneous matter distribution, we take a spherical void surrounded by a dust shell where the ``lost mass'' in the v…
Distance-redshift relation in an isotropic inhomogeneous universe II: Spherically symmetric dust-shell universe
Norimasa Sugiura, Ken-ichi Nakao, Tomohiro Harada
The relation between the angular diameter distance and redshift in a spherically symmetric dust-shell universe is studied. We have discovered that the relation agrees with that of…
Friedmann Limit of a point mass universe (is not Friedmann):Gravinational Lens Effect
Norimasa Sugiura
We study the distance-redshift relation in a universe filled with point particles, and discuss what the universe looks like when we make the number of particles N very large, while…
Distance-redshift relation in an isotropic inhomogeneous universe: Spherically symmertic dust-shell universe
Norimasa Sugiura, Ken-ichi Nakao, Tomohiro Harada
The relation between angular diameter distance and redshift in a spherically symmetric dust-shell universe is studied. This model has large inhomogeneities of matter distribution o…
Effects of the UV background radiation on galaxy formation
Masahiro Nagashima, Naoteru Gouda, Norimasa Sugiura
We investigate the effects of the UV background radiation on galaxy formation by using the semi-analytic model including the photoionization process. The semi-analytic model is bas…