Entropy perturbations and large-scale magnetic fields
arXiv:astro-ph/0604134 · doi:10.1088/0264-9381/23/15/017
Abstract
An appropriate gauge-invariant framework for the treatment of magnetized curvature and entropy modes is developed. It is shown that large-scale magnetic fields, present after neutrino decoupling, affect curvature and entropy perturbations. The evolution of different magnetized modes is then studied across the matter-radiation transition both analytically and numerically. From the observation that, after equality (but before decoupling) the (scalar) Sachs-Wolfe contribution must be (predominantly) adiabatic, constraints on the magnetic power spectra are deduced. The present results motivate the experimental analysis of more general initial conditions of CMB anisotropies (i.e. mixtures of magnetized adiabatic and isocurvature modes during the pre-decoupling phase). The role of the possible correlations between the different components of the fluctuations is partially discussed.
43 pages, 9 figures
References in corpus (35)
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
- Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
- Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
- Cosmological Perturbation Theory in the Synchronous vs. Conformal Newtonian Gauge
- Astrophysical magnetic fields and nonlinear dynamo theory
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
- Small Scale Cosmological Perturbations: An Analytic Approach
- Magnetic Field in Clusters of Galaxies
- The Magnetized Universe
- Magnetohydrodynamics in the Early Universe and the Damping of Non-linear Alfven Waves
- The General Primordial Cosmic Perturbation
- Faraday Rotation of Microwave Background Polarization by a Primordial Magnetic Field
- Microwave Background Signatures of a Primordial Stochastic Magnetic Field
- Microwave Background Signals from Tangled Magnetic Fields
- CMB anisotropies from primordial inhomogeneous magnetic fields
- Faraday Rotation of the Cosmic Microwave Background Polarization by a Stochastic Magnetic Field
- A Faraday Rotation Search for Magnetic Fields in Large Scale Structure
- Effects of Cosmological Magnetic Helicity on the Cosmic Microwave Background
- Magnetized cosmological perturbations
- Small-scale CMB polarization anisotropies due to tangled primordial magnetic fields
- Correlated Primordial Perturbations in Light of CMB and LSS Data
- Faraday Rotation of the Cosmic Microwave Background Polarization and Primordial Magnetic Field Properties
- Limits on isocurvature fluctuations from Boomerang and MAXIMA
- Small-scale microwave background anisotropies due to tangled primordial magnetic fields
- B polarization of the CMB from Faraday rotation
- Non-Gaussianity from Cosmic Magnetic Fields
- Gauge-invariant magnetic perturbations in perfect-fluid cosmologies
- Magnetized CMB anisotropies
- Cosmic microwave background polarization, Faraday rotation and stochastic gravity-waves backgrounds
- Correlated adiabatic and isocurvature CMB fluctuations in the wake of the WMAP
- Magnetized initial conditions for CMB anisotropies
- A covariant and gauge-invariant analysis of cosmic microwave background anisotropies from scalar perturbations
- Magnetized birefringence and CMB polarization
- Interacting viscous mixtures
- The Magnetic Field in Galaxies, Galaxy Clusters, and the InterGalactic Space
Cited by in corpus (44)
- Cosmology with inhomogeneous magnetic fields
- Stringent Limit on Primordial Magnetic Fields from the Cosmic Microwave Background Radiation
- Effects of a Primordial Magnetic Field on Low and High Multipoles of the CMB
- Magnetized CMB observables: a dedicated numerical approach
- Helical Magnetic Fields from Inflation
- Higher order statistics of curvature perturbations in IFF model and its Planck constraints
- Inflation-Produced Magnetic Fields in R^n F^2 and I F^2 models
- Faraday rotation, stochastic magnetic fields and CMB maps
- Primordial backgrounds of relic gravitons
- CMB anisotropies due to cosmological magnetosonic waves
- Tight coupling expansion and fully inhomogeneous magnetic fields
- Constraints on primordial isocurvature perturbations and spatial curvature by Bayesian model selection
- Critical constraint on inflationary magnetogenesis
- Consistency of Planck, ACT and SPT constraints on magnetically assisted recombination and forecasts for future experiments
- Possible extensions of the standard cosmological model: anisotropy, rotation, and magnetic field
- CMB anisotropies in the presence of a stochastic magnetic field
- Acoustic signatures in the Cosmic Microwave Background bispectrum from primordial magnetic fields
- Semi-analytical approach to magnetized temperature autocorrelations
- Parameter dependence of magnetized CMB observables
- Generalized CMB initial conditions with pre-equality magnetic fields
- Constraints on scalar and tensor perturbations in phenomenological and two-field inflation models: Bayesian evidences for primordial isocurvature and tensor modes
- Magneto-reheating constraints from curvature perturbations
- Fluctuations of inflationary magnetogenesis
- Probing large-scale magnetism with the Cosmic Microwave Background
- Generation of Curvature Perturbations with Extra Anisotropic Stress
- Cosmic polarimetry in magnetoactive plasmas
- CMB with the background primordial magnetic field
- Glauber theory and the quantum coherence of curvature inhomogeneities
- Reduced bispectrum seeded by helical primordial magnetic fields
- Why CMB physics?
- Effects of a primordial magnetic field with log-normal distribution on the cosmic microwave background
- Gradient expansion, curvature perturbations and magnetized plasmas
- Effective field theories and inflationary magnetogenesis
- Growth rate of matter perturbations as a probe of large-scale magnetism
- Non-linear curvature inhomogeneities and backreaction for relativistic viscous fluids
- Spectator Higgs, large-scale gauge fields and the non-minimal coupling to gravity
- Quasiadiabatic modes from viscous inhomogeneities
- Magnetic field contribution to the last electron-photon scattering
- Tensor to scalar ratio from single field magnetogenesis
- Magnetization of fluid phonons and large-scale curvature perturbations
- Spectator stresses and CMB observables
- Viscous modes, isocurvature perturbations and CMB initial conditions
- Inflating Kahler Moduli and Primordial Magnetic Fields
- Contrasting formulations of cosmological perturbations in a magnetic FLRW cosmology