scholarly journals Constraints on primordial magnetic fields from the optical depth of the cosmic microwave background

2015 ◽  
Vol 2015 (06) ◽  
pp. 027-027 ◽  
Author(s):  
Kerstin E. Kunze ◽  
Eiichiro Komatsu
Keyword(s):  
Magnetic Fields ◽  
Cosmic Microwave Background ◽  
Optical Depth ◽  
Microwave Background ◽  
Primordial Magnetic Fields

scholarly journals Primordial magnetism in CMB B modes

2013 ◽  
Vol 91 (6) ◽  
pp. 451-454 ◽  
Author(s):  
Levon Pogosian ◽  
Tanmay Vachaspati ◽  
Amit Yadav
Keyword(s):  
Magnetic Fields ◽  
Cosmic Microwave Background ◽  
Frequency Dependence ◽  
Faraday Rotation ◽  
Characteristic Frequency ◽  
Mode Coupling ◽  
Microwave Background ◽  
Small Scales ◽  
Cmb Polarization ◽  
Primordial Magnetic Fields

Cosmic microwave background (CMB) polarization B modes induced by Faraday rotation (FR) can provide a distinctive signature of primordial magnetic fields because of their characteristic frequency dependence and because they are only weakly damped on small scales. FR also leads to mode-coupling correlations between the E- and B-type polarizations and between the temperature and the B mode. These additional correlations can further help distinguish magnetic fields from other sources of B modes. We review the FR-induced CMB signatures and present the constraints on primordial magnetism that can be expected from upcoming CMB experiments. Our results suggest that FR of CMB will be a promising probe of primordial magnetic fields.

Cosmic microwave background bispectrum of vector modes induced from primordial magnetic fields

2010 ◽  
Vol 82 (12) ◽  
Author(s):  
Maresuke Shiraishi ◽  
Daisuke Nitta ◽  
Shuichiro Yokoyama ◽  
Kiyotomo Ichiki ◽  
Keitaro Takahashi
Keyword(s):  
Magnetic Fields ◽  
Cosmic Microwave Background ◽  
Microwave Background ◽  
Primordial Magnetic Fields
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