Magnetic Field Spectrum at Cosmological Recombination (2007)
Ichiki, Kiyotomo, Takahashi, Keitaro, Sugiyama, Naoshi, Hanayama, Hidekazu, Ohno, Hiroshi
A generation of magnetic fields from cosmological density perturbations is investigated. In the primordial plasma before cosmological recombination, all of the materials except dark matter in the...
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...
Cosmological Magnetic Field: a fossil of density perturbations in the early universe (2006)
Ichiki, Kiyotomo, Takahashi, Keitaro, Ohno, Hiroshi, Hanayama, Hidekazu, Sugiyama, Naoshi
The origin of the substantial magnetic fields that are found in galaxies and on even larger scales, such as in clusters of galaxies, is yet unclear. If the second-order couplings between photons and...
Generation of magnetic field from cosmological perturbations (2006)
Takahashi, Keitaro, Ichiki, Kiyotomo, Ohno, Hiroshi, Hanayama, Hidekazu, Sugiyama, Naoshi
We discuss generation of magnetic field from cosmological perturbations. We consider the evolution of three component plasma (electron, proton and photon) evaluating the collision term between...
Biermann Mechanism in Primordial Supernova Remnant and Seed Fields (2005)
Hanayama, Hidekazu, Takahashi, Keitaro, Kotake, Kei, Oguri, Masamune, Ichiki, Kiyotomo, Ohno, Hiroshi
We have studied the generation of magnetic fields by the Biermann mechanism in the pair-instability supernovae explosions of the first stars. The Biermann mechanism produces magnetic fields in the...
Long-Term Evolution of Supernova Remnants in Magnetized Interstellar Medium (2005)
Hanayama, Hidekazu, Tomisaka, Kohji
The evolution of supernova remnants (SNRs) is studied, with particular attention to the effect of magnetic fields with axisymmetric two-dimensional magnetohydrodynamical simulations. The evolution of...
Magnetic field generation from cosmological perturbations (2005)
Takahashi, Keitaro, Ichiki, Kiyotomo, Ohno, Hiroshi, Hanayama, Hidekazu
In this letter, we discuss generation of magnetic field from cosmological perturbations. We consider the evolution of three component plasma (electron, proton and photon) evaluating the collision...
Biermann Mechanism in Primordial Supernova Remnant and Seed Magnetic Fields (2005)
Hanayama, Hidekazu, Takahashi, Keitaro, Kotake, Kei, Oguri, Masamune, Ichiki, Kiyotomo, Ohno, Hiroshi
We study generation of magnetic fields by the Biermann mechanism in the pair-instability supernovae explosions of first stars. The Biermann mechanism produces magnetic fields in the shocked region...