49 citations · 150 across the 8 of their papers we have counts for
8 papers
Elucidating Dark Energy with Future 21 cm Observations at the Epoch of Reionization
Kazunori Kohri, Yoshihiko Oyama, Toyokazu Sekiguchi +1
We investigate how precisely we can determine the nature of dark energy such as the equation of state (EoS) and its time dependence by using future observations of 21 cm fluctuatio…
Constraining light gravitino mass with 21 cm line observation
Yoshihiko Oyama, Masahiro Kawasaki
We investigate how well we can constrain the mass of light gravitino m_3/2 by using future observations of 21 cm line fluctuations such as Square Kilometre Array (SKA) and Omniscop…
Cosmology with the Square Kilometre Array by SKA-Japan
Daisuke Yamauchi, Kiyotomo Ichiki, Kazunori Kohri +8
In the past several decades, the standard cosmological model has been established and its parameters have been measured to a high precision, while there are still many of the funda…
Constraints on the neutrino parameters by future cosmological 21cm line and precise CMB polarization observations (PhD thesis, The Graduate University for Advanced Studies (SOKENDAI))
Yoshihiko Oyama
Observations of the 21 cm line radiation coming from the epoch of reionization have a great capacity to study the cosmological growth of the Universe. Also, CMB polarization produc…
Constraints on the neutrino parameters by future cosmological 21cm line and precise CMB polarization observations
Yoshihiko Oyama, Kazunori Kohri, Masashi Hazumi
Observations of the 21 cm line radiation coming from the epoch of reionization have a great capacity to study the cosmological growth of the Universe. Also, CMB polarization produc…
Probing Lepton Asymmetry with 21 cm Fluctuations
Kazunori Kohri, Yoshihiko Oyama, Toyokazu Sekiguchi +1
We investigate the issue of how accurately we can constrain the lepton number asymmetry xi_nu = mu_nu/T_nu in the Universe by using future observations of 21 cm line fluctuations a…
Precise Measurements of Primordial Power Spectrum with 21 cm Fluctuations
Kazunori Kohri, Yoshihiko Oyama, Toyokazu Sekiguchi +1
We discuss the issue of how precisely we can measure the primordial power spectrum by using future observations of 21 cm fluctuations and cosmic microwave background (CMB). For thi…
Determination of neutrino mass hierarchy by 21 cm line and CMB B-mode polarization observations
Yoshihiko Oyama, Akie Shimizu, Kazunori Kohri
We focus on the ongoing and future observations for both the 21 cm line and the CMB B-mode polarization produced by a CMB lensing, and study their sensitivities to the effective nu…