CMB distortion anisotropies due to the decay of primordial magnetic fields

Abstract

We investigate the power spectrum of the distortion of Cosmic Microwave Background (CMB) due to the decay of the primordial magnetic fields. It is known that there are two-types of the CMB distortions, so-called μ- and y-types and we find that the signal of the y-type distortion becomes larger than that of the μ-type one. We also discuss cross power spectra between the CMB distortions and the CMB temperature anisotropy, which are naturally generated due to the existence of the primordial magnetic fields. We find that such cross power spectra have small amplitudes compared with the auto-power spectra of the CMB distortions because of the Silk damping effect of the temperature anisotropy. We also investigate the possibility of detecting such signal in the future CMB experiments, including not only absolutely calibrated experiments such as PIXIE but also relatively calibrated experiments such as LiteBIRD and CMBpol.

18 pages, 8 figures, 1 table

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Cited by in corpus (18)

• Progress on Cosmological Magnetic Fields
• Probing the scale dependence of non-Gaussianity with spectral distortions of the cosmic microwave background
• Primordial trispectra and CMB spectral distortions
• The evolution of primordial magnetic field since its generation
• Searching for Primordial Magnetic Fields with CMB B-modes
• Generation of large-scale magnetic fields, non-Gaussianity, and primordial gravitational waves in inflationary cosmology
• Primordial non-Gaussianity with $\mu$-type and $y$-type spectral distortions: exploiting Cosmic Microwave Background polarization and dealing with secondary sources
• Probing large-scale magnetism with the Cosmic Microwave Background
• CMB spectral distortions from the decay of causally generated magnetic fields
• Angular dependence of primordial trispectra and CMB spectral distortions
• Measuring primordial anisotropic correlators with CMB spectral distortions
• Magnetic reheating
• Fundamental Implications of Intergalactic Magnetic Field Observations
• Probing early-universe phase transitions with CMB spectral distortions
• Separation of CMB $\mu$ spectral distortions from foregrounds with poorly defined spectral shapes
• Test of the Einstein equivalence principle with spectral distortions in the cosmic microwave background
• Probing the Running of Primordial Bispectrum and Trispectrum using CMB Spectral Distortions
• Primordial magnetic non-Gaussianity with generic vacua and detection prospects in CMB spectral distortions