Cosmic polarimetry in magnetoactive plasmas

Abstract

Polarimetry of the Cosmic Microwave Background (CMB) represents one of the possible diagnostics aimed at testing large-scale magnetism at the epoch of the photon decoupling. The propagation of electromagnetic disturbances in a magnetized plasma leads naturally to a B-mode polarization whose angular power spectrum is hereby computed both analytically and numerically. Combined analyses of all the publicly available data on the B-mode polarization are presented, for the first time, in the light of the magnetized $\Lambda$CDM scenario. Novel constraints on pre-equality magnetism are also derived in view of the current and expected sensitivities to the B-mode polarization.

34 pages, 13 figures

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Cited by in corpus (15)

• Primordial magnetogenesis
• Primordial Magnetism in the CMB: Exact Treatment of Faraday Rotation and WMAP7 Bounds
• Cosmological magnetic field survival
• Parameter dependence of magnetized CMB observables
• Probing large-scale magnetism with the Cosmic Microwave Background
• Large-Scale Magnetic Fields, Dark Energy and QCD
• Circular dichroism, magnetic knots and the spectropolarimetry of the Cosmic Microwave Background
• Photon-neutrino scattering and the B-mode spectrum of CMB photons
• Dark energy, integrated Sachs-Wolfe effect and large-scale magnetic fields
• The B-mode polarization of CMB and Cosmic Neutrino Background
• Gradient expansion, curvature perturbations and magnetized plasmas
• Bootstrapping from inflationary magnetogenesis to CMB initial conditions
• A circular polarimeter for the Cosmic Microwave Background
• Faraday scaling and the Bicep2 observations
• Tensor B mode and stochastic Faraday mixing