Magnetic field back reaction on the matter power spectrum

Abstract

At lowest order comoving magnetic fields which are frozen-into the expanding cosmic fluid do not evolve in time. At next-to-leading order the induction equation is sourced by the interaction term between the baryon velocity and the magnetic field amplitude which leads to a non-trivial evolution of the comoving magnetic field. Moreover, it induces non-trivial cross correlations between the adiabatic curvature mode and the magnetic mode. This cross correlation together with the evolution of the induced matter perturbation leads to interesting effects on the total matter power spectrum at small scales.

arXiv comment14 pages, 4 figures

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Cited by in corpus (4)

• Dark Matter Minihalos from Primordial Magnetic Fields
• Primordial magnetic fields: consistent initial conditions and impact on high-z structures
• LiteBIRD Science Goals and Forecasts: Primordial Magnetic Fields
• Revisiting primordial magnetic fields through 21-cm physics: Bounds and forecasts