13 citations · 21 across the 3 of their papers we have counts for
3 papers
astro-ph.CO2017★ 8 cited
Observational Constraint on Spherical Inhomogeneity with CMB and Local Hubble Parameter
Masato Tokutake, Kiyotomo Ichiki, Chul-Moon Yoo
We derive an observational constraint on a spherical inhomogeneity of the void centered at our position from the angular power spectrum of the cosmic microwave background(CMB) and…
astro-ph.CO2011★ 13 cited
Primordial magnetic fields generated by the non-adiabatic fluctuations at pre-recombination era
Satoshi Maeda, Keitaro Takahashi, Kiyotomo Ichiki
In the pre-recombination era, cosmological density fluctuations can naturally generate magnetic fields through Thomson scatterings. In previous studies, only the magnetic field gen…
astro-ph2002
Constrainting Cosmic Quintessence
G. J. Mathews, K. Ichiki, T. Kajino +2
A generic feature of cosmic quintessence models is the possibility of significant energy density in the scalar field during the radiation dominated epoch. This possibility is even…