CMB anisotropies due to cosmological magnetosonic waves

Abstract

We study scalar mode perturbations (magnetosonic waves) induced by a helical stochastic cosmological magnetic field and derive analytically the corresponding cosmic microwave background (CMB) temperature and polarization anisotropy angular power spectra. We show that the presence of a stochastic magnetic field, or an homogeneous magnetic field, influences the acoustic oscillation pattern of the CMB anisotropy power spectrum, effectively acting as a reduction of the baryon fraction. We find that the scalar magnetic energy density perturbation contribution to the CMB temperature anisotropy is small compared to the contribution to the CMB $E$-polarization anisotropy.

17 pages, references added, version accepted for publication in Phys. Rev. D

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Cited by in corpus (26)

• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Cosmology with inhomogeneous magnetic fields
• The Beginning and Evolution of the Universe
• The cosmic microwave background temperature bispectrum from scalar perturbations induced by primordial magnetic fields
• Effects of a Primordial Magnetic Field on Low and High Multipoles of the CMB
• CMB Temperature Anisotropy from Broken Spatial Isotropy due to an Homogeneous Cosmological Magnetic Field
• Primordial magnetic field limits from cosmological data
• The Impact of Stochastic Primordial Magnetic Fields on the Scalar Contribution to Cosmic Microwave Background Anisotropies
• The Search for a Primordial Magnetic Field
• On the non-Gaussian correlation of the primordial curvature perturbation with vector fields
• Numerical simulations of the decay of primordial magnetic turbulence
• 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
• Semi-analytical approach to magnetized temperature autocorrelations
• Constraints on the Primordial Magnetic Field from ${\sigma }_8$
• Large-scale magnetic fields, curvature fluctuations and the thermal history of the Universe
• Neutrino mass effects on vector and tensor CMB anisotropies in the presence of a primordial magnetic field
• CMB with the background primordial magnetic field
• LiteBIRD Science Goals and Forecasts: Primordial Magnetic Fields
• Power spectrum of post-inflationary primordial magnetic fields
• Cosmological magnetic braking and the formation of high-redshift, super-massive black holes
• Magnetic fields, strings and cosmology
• MHD waves within Noncommutative Maxwell theory
• Magnetization of fluid phonons and large-scale curvature perturbations
• Distinguishing Primordial Magnetic Fields from Inflationary Tensor Perturbations in the Cosmic Microwave Background