Resonant high energy graviton to photon conversion at post recombination epoch

Abstract

Resonant conversion of high energy gravitons into photons in large scale cosmological magnetic fields at the post recombination epoch is considered. It is shown that the probability of the resonance photon production is much higher than the non-resonant one. As a result an observable isotropic background of cosmic gamma rays might be created. As shown in our previous paper, an early population of primordial black holes (PBHs) prior to big bang nucleosynthesis (BBN) could be an efficient source of high frequency gravitational waves. For the primordial black hole mass about $10^8$ g the produced photons would be the dominant component of the soft to hard Cosmic X-ray Background (CXB) and for lower masses the spectrum is shifted down to the ultraviolet and optic.

16 pages, 11 figures, more references has been added. Published version

References in corpus (6)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
• Gravitational Waves: Sources, Detectors and Searches
• Relic gravitational waves from light primordial black holes
• Faraday Rotation Limits on a Primordial Magnetic Field from WMAP Five-Year Data
• Conversion of relic gravitational waves into photons in cosmological magnetic fields
• Constraints on a Stochastic Background of Primordial Magnetic Fields with WMAP and South Pole Telescope data

Cited by in corpus (11)

• Baryon Asymmetry, Dark Matter, and Density Perturbation from PBH
• Green's function of the cosmological thermalization problem II: effect of photon injection and constraints
• Spectral distortion constraints on photon injection from low-mass decaying particles
• Tests of the CMB temperature-redshift relation, CMB spectral distortions and why adiabatic photon production is hard
• Axion-like particles from primordial black holes shining through the Universe
• GRAPH mixing
• Shimmering gravitons in the gamma-ray sky
• Graviton-photon mixing. Exact solution in a constant magnetic field
• Conversion of Gravitons into Dark Photons in Cosmological Dark Magnetic Fields
• Graviton to photon conversion in curved space-time and external magnetic field
• Graviton creation from the CMB in large scale magnetic fields