Dai G. Yamazaki

Constraints on the Primordial Magnetic Field from $\sigma_8$ (2008)

Yamazaki, Dai G., Ichiki, Kiyotomo, Kajino, Toshitaka, Mathews, Grant. J.

A primordial magnetic field (PMF) can affect the evolution of density field fluctuations in the early universe.In this paper we constrain the PMF amplitude $B_\lambda$ and power spectral index...

Neutrino mass effects on vector and tensor CMB anisotropies in the presence of a primordial magnetic field (2008)

Kojima, Kazuhiko, Ichiki, Kiyotomo, Yamazaki, Dai G., Kajino, Toshitaka, Mathews, Grant J.

If a primordial magnetic field (PMF) is present during photon decoupling and afterward, a finite neutrino mass can affect all modes of the CMB. In this work, we expand on earlier studies of the...

Effects of a Primordial Magnetic Field on Low and High Multipoles of the CMB (2008)

Yamazaki, Dai G., Ichiki, Kiyotomo, Kajino, Toshitaka, Mathews, Grant J.

The existence of a primordial magnetic field (PMF) would affect both the temperature and polarization anisotropies of the cosmic microwave background (CMB). It also provides a plausible explanation...

Effect of Primordial Magnetic Field on Seeds for Large Scale Structure (2006)

Yamazaki, Dai G., Ichiki, Kiyotomo, Umezu, Ken-ichi, Hanayama, Hidekazu

Magnetic field plays a very important role in many astronomical phenomena at various scales of the universe. It is no exception in the early universe. Since the energy density, pressure, and tension...

Primordial magnetic field constrained from CMB anisotropies,and its generation and evolution before, during and after the BBN (2006)

Yamazaki, Dai G., Ichiki, Kiyotomo, Kajino, Toshitaka, Mathews, Grant J.

The primordial magnetic field (PMF) can strongly affect the cosmic microwave background (CMB) power spectrum and the formation of large scale structure. In this presentation, we calculate the CMB...