2013/10/15 by Koichi Miyamoto, Toyokazu Sekiguchi, Hiroyuki Tashiro +1
Physics and Astronomy · #Amplitude #Anisotropy #Astronomy #Astrophysics #Computational physics #Cosmic microwave background #Cosmology and Gravitation Theories #Distortion (music) #Galaxies: Formation, Evolution, Phenomena #Magnetic field #Microwave #Optics #Physics #Quantum mechanics #SIGNAL (programming language) #Solar and Space Plasma Dynamics #Spectral density #Spectral line #astro-ph.CO #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.89.063508
published as Phys. Rev. D 89, 063508 (2014) · 18 pages, 8 figures, 1 table
arxiv created 2013/10/15 · openalex publication_date 2014/03/06 · arxiv updated 2014/03/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the power spectrum of the distortion of the 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 \ensuremathμ and y types, and we find that the signal of the y-type distortion becomes larger than that of the \ensuremathμ-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 autopower spectra of the CMB distortions because of the Silk damping effect of the temperature anisotropy. We also investigate the possibility of detecting such a 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.