scholarly journals A Strong Constraint on the Neutrino Mass from the Formation of Large Scale Structure in the Presence of the Primordial Magnetic Field

2009 ◽  
Author(s):  
Dai Yamazaki
Keyword(s):  
Magnetic Field ◽  
Neutrino Mass ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Strong Constraint ◽  
Primordial Magnetic Field

scholarly journals Primordial Magnetic Field Effects on the CMB and Large-Scale Structure

2010 ◽  
Vol 2010 ◽  
pp. 1-19 ◽  
Author(s):  
Dai G. Yamazaki ◽  
Kiyotomo Ichiki ◽  
Toshitaka Kajino ◽  
Grant J. Mathews
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Large Scale ◽  
Large Scale Structure ◽  
Big Bang ◽  
Scale Structure ◽  
Magnetic Field Effects ◽  
Power Spectral ◽  
Primordial Magnetic Field ◽  
The Big Bang

Magnetic fields are everywhere in nature, and they play an important role in every astronomical environment which involves the formation of plasma and currents. It is natural therefore to suppose that magnetic fields could be present in the turbulent high-temperature environment of the big bang. Such a primordial magnetic field (PMF) would be expected to manifest itself in the cosmic microwave background (CMB) temperature and polarization anisotropies, and also in the formation of large-scale structure. In this paper, we summarize the theoretical framework which we have developed to calculate the PMF power spectrum to high precision. Using this formulation, we summarize calculations of the effects of a PMF which take accurate quantitative account of the time evolution of the cutoff scale. We review the constructed numerical program, which is without approximation, and an improvement over the approach used in a number of previous works for studying the effect of the PMF on the cosmological perturbations. We demonstrate how the PMF is an important cosmological physical process on small scales. We also summarize the current constraints on the PMF amplitudeBλand the power spectral indexnBwhich have been deduced from the available CMB observational data by using our computational framework.

EFFECTS OF PRIMORDIAL MAGNETIC FIELD ON EARLY UNIVERSE

2008 ◽  
Vol 23 (17n20) ◽  
pp. 1695-1706 ◽  
Author(s):  
DAI G. YAMAZAKI ◽  
KIYOTOMO ICHIKI ◽  
KAJINO TOSHITAKA ◽  
GRANT J. MATHEWS
Keyword(s):  
Magnetic Field ◽  
Power Spectrum ◽  
Cosmic Microwave Background ◽  
Early Universe ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Microwave Background ◽  
Primordial Magnetic Field

The existence of a primordial magnetic field (PMF) would affect both the temperature and polarization anisotropies of the cosmic microwave background (CMB) and the formation of the large scale structure(LSS). It also provides a plausible explanation for the disparity between observations and theoretical fits to the CMB power spectrum and the LSS. Here we report on calculations of not only the numerical power spectrum of the PMF, but also the correlations between the PMF power spectrum and the primary curvature perturbations.

Effect of primordial magnetic field on seeds for large scale structure

2006 ◽  
Vol 74 (12) ◽  
Author(s):  
Dai Great Yamazaki ◽  
Kiyotomo Ichiki ◽  
Ken-ichi Umezu ◽  
Hidekazu Hanayama
Keyword(s):  
Magnetic Field ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Primordial Magnetic Field

Magnetic Field Effects on the CMB and Large-Scale Structure

2010 ◽  
Author(s):  
Dai G. Yamazaki ◽  
Kiyotomo Ichiki ◽  
Toshitaka Kajino ◽  
Grant. J. Mathews ◽  
Isao Tanihara ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Magnetic Field Effects ◽  
Field Effects

scholarly journals Pulsar Rotation Measures and the Large‐Scale Structure of the Galactic Magnetic Field

2006 ◽  
Vol 642 (2) ◽  
pp. 868-881 ◽  
Author(s):  
J. L. Han ◽  
R. N. Manchester ◽  
A. G. Lyne ◽  
G. J. Qiao ◽  
W. van Straten
Keyword(s):  
Magnetic Field ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Galactic Magnetic Field
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