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Secondary CMB anisotropies from bulk motions in the presence of stochastic magnetic fields

Kerstin E. Kunze*

  • Departamento de Física Fundamental and IUFFyM, Universidad de Salamanca, Plaza de la Merced s/n, 37008 Salamanca, Spain

  • *kkunze@usal.es
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Phys. Rev. D 89, 103016 – Published 27 May, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.103016

Abstract

Bulk motions of electrons along the line of sight induce secondary temperature fluctuations in the postdecoupling, reionized Universe. In the presence of a magnetic field not only the scalar mode but also the vector mode act as a source for the bulk motion. The resulting angular power spectrum of temperature anisotropies of the cosmic microwave background is calculated assuming a simple model of reionization. Contributions from the standard adiabatic, curvature mode and a nonhelical magnetic field are included. The contribution due to magnetic fields with field strengths of order nG and negative magnetic spectral indices becomes important for multipoles larger than ℓ∼104.

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Phys. Rev. D 89, 103016– Published 27 May, 2014
  • Received 20 December 2013

© 2014 American Physical Society

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