Effects on the CMB from magnetic field dissipation before recombination

Autor:	Kunze, Kerstin E.
Rok vydání:	2017
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj:	Phys. Rev. D 96, 063526 (2017)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.96.063526
Popis:	Magnetic fields present before decoupling are damped due to radiative viscosity. This energy injection affects the thermal and ionization history of the cosmic plasma. The implications for the CMB anisotropies and polarization are investigated for different parameter choices of a non helical stochastic magnetic field. Assuming a Gaussian smoothing scale determined by the magnetic damping wave number at recombination it is found that magnetic fields with present day strength less than 0.1 nG and negative magnetic spectral indices have a sizeable effect on the CMB temperature anisotropies and polarization. Comment: 11 pages, 8 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1703.03650 Zobrazit plný text záznamu View this record from Arxiv