Current and Future Constraints on Primordial Magnetic Fields

Abstract

We present new limits on the amplitude of potential primordial magnetic fields (PMFs) using temperature and polarization measurements of the cosmic microwave background (CMB) from Planck, BICEP2/Keck Array, POLARBEAR, and SPTpol. We reduce twofold the 95% CL upper limit on the CMB anisotropy power due to a nearly-scale-invariant PMF, with an allowed B-mode power at $\ell =1500$ of $D_{\ell =1500}^{BB}<0.071\mu K^2$ for Planck versus $D_{\ell =1500}^{BB}<0.034\mu K^2$ for the combined dataset. We also forecast the expected limits from soon-to-deploy CMB experiments (like SPT-3G, Adv. ACTpol, or the Simons Array) and the proposed CMB-S4 experiment. Future CMB experiments should dramatically reduce the current uncertainties, by one order of magnitude for the near-term experiments and two orders of magnitude for the CMB-S4 experiment. The constraints from CMB-S4 have the potential to rule out much of the parameter space for PMFs.

Submitted to ApJ, 10 pages

References in corpus (13)

• BICEP2 / Keck Array VI: Improved Constraints On Cosmology and Foregrounds When Adding 95 GHz Data From Keck Array
• The origin, evolution and signatures of primordial magnetic fields
• Advanced ACTPol Cryogenic Detector Arrays and Readout
• SPT-3G: A Next-Generation Cosmic Microwave Background Polarization Experiment on the South Pole Telescope
• CMB anisotropies from primordial inhomogeneous magnetic fields
• The POLARBEAR-2 and the Simons Array Experiment
• Cosmological Magnetic Field: a fossil of density perturbations in the early universe
• Measurements of Sub-degree B-mode Polarization in the Cosmic Microwave Background from 100 Square Degrees of SPTpol Data
• POLARBEAR Constraints on Cosmic Birefringence and Primordial Magnetic Fields
• CMB Temperature Anisotropy from Broken Spatial Isotropy due to an Homogeneous Cosmological Magnetic Field
• Primordial magnetic field limits from cosmological data
• Demonstration of cosmic microwave background delensing using the cosmic infrared background
• Measurements of E-Mode Polarization and Temperature-E-Mode Correlation in the Cosmic Microwave Background from 100 Square Degrees of SPTpol Data

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• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
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• Measurements of B-mode Polarization of the Cosmic Microwave Background from 500 Square Degrees of SPTpol Data
• Gauge-field production during axion inflation in the gradient expansion formalism
• Backreaction of electromagnetic fields and the Schwinger effect in pseudoscalar inflation magnetogenesis
• Searching for Anisotropic Cosmic Birefringence with Polarization Data from SPTpol
• Influence of backreaction of electric fields and Schwinger effect on inflationary magnetogenesis
• Consistency of Planck, ACT and SPT constraints on magnetically assisted recombination and forecasts for future experiments
• Constraints on primordial magnetic fields from magnetically-induced perturbations: current status and future perspectives with LiteBIRD and future ground based experiments
• Backreaction from gauge fields produced during inflation
• Searching for Primordial Magnetic Fields with CMB B-modes
• Magnetogenesis in Higgs-Starobinsky inflation
• On the challenges in the choice of the non-conformal coupling function in inflationary magnetogenesis
• Revisiting Magnetogenesis during Inflation
• Kinetic approach to the Schwinger effect during inflation
• Primordial Helical Magnetic Fields from Inflation?
• The Impact of Primordial Magnetic Fields on Future CMB Bounds on Inflationary Gravitational Waves
• Magnetogenesis in Higgs inflation
• Distribution function of nuclei from $e^{\pm }$ scattering in the presence of a strong primordial magnetic field