Primordial magnetism in CMB polarization

2nd International Symposium on the Modern Physics of Compact Stars and Relativistic Gravity

物理学;天文学

Pogosian, Levon^1

Department of Physics, Simon Fraser University, Burnaby, BC V5A 1S6, Canada^1

关键词: Characteristic frequencies;    CMB polarization;    Cosmic magnetic fields;    Milky ways;    Mode coupling;    Mode signals;    Potential sources;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/496/1/012025/pdf
DOI  :  10.1088/1742-6596/496/1/012025

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

A large scale B-mode signal in the CMB polarization would constitute a smoking gun of Inflation and is the main target of several ongoing and upcoming experiments. In this contribution, I consider distinguishing features of another potential source of primordial B-modes - magnetic fields. In particular, the Faraday Rotation of CMB polarization provides a distinctive signature of cosmic magnetic fields through the characteristic frequency dependence and the mode-coupling correlations of the CMB variables. I discuss constraints on primordial magnetism that can be expected from future CMB experiments, taking into account the obstruction caused by the magnetic field of the Milky Way.