Cosmological constraints on axionic dark radiation from axion-photon conversion in the early Universe

Abstract

Axions seem ubiquitous in string theories and some of them may be produced non-thermally by heavy scalar decays, contributing to dark radiation. We study various cosmological effects of photons produced from the axionic dark radiation through axion-photon conversion in the presence of primordial magnetic fields, and derive tight constraints on the combination of the axion-photon coupling and the primordial magnetic field.

24 pages, 4 figures; references added, minor corrections; to appear in JCAP

References in corpus (10)

• Moduli-Induced Gravitino Problem
• Moduli Decays and Gravitinos
• Dark Radiation in LARGE Volume Models
• Microwave Background Constraints on Mixing of Photons with Hidden Photons
• Signatures of a hidden cosmic microwave background
• Moduli/Inflaton Mixing with Supersymmetry Breaking Field
• Cosmological implications of supersymmetric axion models
• Moduli-Induced Axion Problem
• Axions and saxions from the primordial supersymmetric plasma and extra radiation signatures
• Dark radiation and small-scale structure problems with decaying particles

Cited by in corpus (20)

• The radio telescope search for the resonant conversion of cold dark matter axions from the magnetized astrophysical sources
• The Cosmic Axion Background
• Direct Search for Dark Matter Axions Excluding ALP Cogenesis in the 63-67 micro-eV Range, with The ORGAN Experiment
• Soft X-ray Excess in the Coma Cluster from a Cosmic Axion Background
• Constraints on primordial magnetic fields from CMB distortions in the axiverse
• Cosmological constraints on decaying axion-like particles: a global analysis
• On axionic dark matter in Type IIA string theory
• Anisotropic cosmic optical background bound for decaying dark matter in light of the LORRI anomaly
• Constraints on hidden photons from current and future observations of CMB spectral distortions
• Dipole Radiation and Beyond from Axion Stars in Electromagnetic Fields
• Comparing Instrument Spectral Sensitivity of Dissimilar Electromagnetic Haloscopes to Axion Dark Matter and High Frequency Gravitational Waves
• Poynting vector controversy in axion modified electrodynamics
• Reionization during the dark ages from a cosmic axion background
• Limits on Dark Photons, Scalars, and Axion-Electromagnetodynamics with The ORGAN Experiment
• Searching for Low-Mass Axions using Resonant Upconversion
• Axionic Dark Radiation and the Milky Way's Magnetic Field
• The Darkness of Spin-0 Dark Radiation
• Shining ALP Dark Radiation
• Searching for relativistic axions in the sky
• 130GeV gamma-ray line through axion conversion