2012/11/30 by A. D. Dolgov, Alexander D. Dolgov, Damian Ejlli · 59 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Big Bang (financial markets) #Binary black hole #Cosmic background radiation #Cosmic microwave background #Cosmology and Gravitation Theories #Electromagnetic radiation #Gravitation #Gravitational wave #Graviton #Photon #Physics #Primordial black hole #Pulsars and Gravitational Waves Research #Quantum mechanics #Universe #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1088/1475-7516/2012/12/003
published in Journal of Cosmology and Astroparticle Physics 2012(12), 003 (Institute of Physics) · 24 pages, 8 figures and 1 table; minor changes and more references have been added
openalex publication_date 2012/12/05 · arxiv created 2012/12/15 · arxiv updated 2012/12/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Conversion of gravitational waves into electromagnetic radiation is discussed. The probability of transformations of gravitons into photons in presence of cosmological background magnetic field is calculated at the recombination epoch and during subsequent cosmological stages. The produced electromagnetic radiation is concentrated in the X-ray part of the spectrum. It is shown that if the early Universe was dominated by primordial black holes (PBHs) prior to Big Bang Nucleosynthesis (BBN), the relic gravitons emitted by PBHs would transform to an almost isotropic background of electromagnetic radiation due to conversion of gravitons into photons in cosmological magnetic fields. Such extragalactic radiation could be noticeable or even dominant component of Cosmic X-ray Background.