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- W2795403876 endingPage "034" @default.
- W2795403876 startingPage "034" @default.
- W2795403876 abstract "We investigate the statistical properties of isotropic, stochastic, Gaussian distributed, helical magnetic fields characterized by different shapes of the energy spectra at large length scales and study the associated realizability condition. We discuss smoothed magnetic fields that are commonly used when the primordial magnetic field is constrained by observational data. We are particularly interested in scale-invariant magnetic fields that can be generated during the inflationary stage by quantum fluctuations. We determine the correlation length of such magnetic fields and relate it to the infrared cutoff of perturbations produced during inflation. We show that this scale determines the observational signatures of the inflationary magnetic fields on the cosmic microwave background. At smaller scales, the scale-invariant spectrum changes with time. It becomes a steeper weak-turbulence spectrum at progressively larger scales. We show numerically that the critical length scale where this happens is the turbulent-diffusive scale, which increases with the square root of time." @default.
- W2795403876 created "2018-04-13" @default.
- W2795403876 creator A5023825995 @default.
- W2795403876 creator A5023835521 @default.
- W2795403876 creator A5045149443 @default.
- W2795403876 creator A5053290543 @default.
- W2795403876 creator A5071569623 @default.
- W2795403876 date "2018-08-22" @default.
- W2795403876 modified "2023-10-18" @default.
- W2795403876 title "Statistical properties of scale-invariant helical magnetic fields and applications to cosmology" @default.
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