Primordial magnetic fields and CMB anisotropies

Abstract

Possible signatures of primordial magnetic fields on the Cosmic Microwave Background (CMB) temperature and polarization anisotropies are reviewed. The signals that could be searched for include excess temperature anisotropies particularly at small angular scales below the Silk damping scale, B-mode polarization, and non-Gaussian statistics. A field at a few nG level produces temperature anisotropies at the 5 micro Kelvin level, and B-mode polarization anisotropies 10 times smaller, and is therefore potentially detectable via the CMB anisotropies. An even smaller field, with B_0 < 0.1 nG, could lead to structure formation at high redshift z > 15, and hence naturally explain an early re-ionization of the Universe.

6 pages, 4 figures, talk given in Bologna, August 2005, proceedings of "The Origin and Evolution of Cosmic Magnetism", Astron. Nachr. (in press)

References in corpus (32)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• A Line of Sight Approach to Cosmic Microwave Background Anisotropies
• Astrophysical magnetic fields and nonlinear dynamo theory
• Magnetic Fields in the Early Universe
• Origin of Galactic and Extragalactic Magnetic Fields
• The significance of the largest scale CMB fluctuations in WMAP
• CMB Anisotropies: Total Angular Momentum Method
• The Magnetized Universe
• Extended Mosaic Observations with the Cosmic Background Imager
• Constraints on a Primordial Magnetic Field
• Damping of Cosmic Magnetic Fields
• Cosmological Magnetic Fields Limits in an Inhomogeneous Universe
• Magnetohydrodynamics in the Early Universe and the Damping of Non-linear Alfven Waves
• Evolving turbulence and magnetic fields in galaxy clusters
• Faraday Rotation of Microwave Background Polarization by a Primordial Magnetic Field
• Microwave Background Signatures of a Primordial Stochastic Magnetic Field
• Plasma instabilities and magnetic-field growth in clusters of galaxies
• Microwave Background Signals from Tangled Magnetic Fields
• A Limit on Primordial Small-Scale Magnetic Fields from CMB Distortions
• Gravitational wave production: A strong constraint on primordial magnetic fields
• CMB anisotropies from primordial inhomogeneous magnetic fields
• Tensor Microwave Anisotropies from a Stochastic Magnetic Field
• Faraday Rotation of the Cosmic Microwave Background Polarization by a Stochastic Magnetic Field
• Probing the Reionization History of the Universe using the Cosmic Microwave Background Polarization
• Small-scale CMB polarization anisotropies due to tangled primordial magnetic fields
• Cosmic Microwave Background Polarization Signals from Tangled Magnetic Fields
• Distortion of the acoustic peaks in the CMBR due to a primordial magnetic field
• Faraday Rotation of the Cosmic Microwave Background Polarization and Primordial Magnetic Field Properties
• Small-scale microwave background anisotropies due to tangled primordial magnetic fields
• Magnetized CMB anisotropies
• Constraining the Primordial Magnetic Field from Cosmic Microwave Background Anisotropies at Higher Multipoles
• Large Scale Magnetic Fields: Galaxy Two-Point correlation function

Cited by in corpus (21)

• Planck 2013 results. XVI. Cosmological parameters
• The origin, evolution and signatures of primordial magnetic fields
• The First Magnetic Fields
• The Beginning and Evolution of the Universe
• CMB bispectrum from primordial magnetic fields on large angular scales
• Primordial Magnetic Field Limits from Cosmic Microwave Background Bispectrum of Magnetic Passive Scalar Modes
• Faraday rotation, stochastic magnetic fields and CMB maps
• CMB anisotropies due to cosmological magnetosonic waves
• Primordial Magnetic Field Limits from CMB Trispectrum - Scalar Modes and Planck Constraints
• Cosmic Microwave Background Trispectrum and Primordial Magnetic Field Limits
• Magnetogenesis, spectator fields and CMB signatures
• Primordial magnetic field generation via primordial black hole disks
• Generalized CMB initial conditions with pre-equality magnetic fields
• Limits on high-frequency gravitational wave background from its interplay with large scale magnetic fields
• Symmetry restoration at finite temperature with weak magnetic fields
• Primordial magnetic field constraints from the end of reionization
• Magnetic field generation from primordial black hole distributions
• Magnetic heating across the cosmological recombination era: Results from 3D MHD simulations
• The Origin of Primordial Magnetic Fields
• Finding Evidence for Inflation and the Origin of Galactic Magnetic Fields with CMB Surveys
• Hydromagnetic waves in an expanding universe -- cosmological MHD code tests using analytic solutions