skip to main content

SciTech ConnectSciTech Connect

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

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.
Authors:
 [1] ;  [2] ;  [3]
  1. Theory Center, KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan)
  2. Department of Physics, The University of Tokyo, Tokyo 113-0033 (Japan)
  3. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)
Publication Date:
OSTI Identifier:
22282646
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2013; Journal Issue: 09; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AXIONS; COUPLING; LIMITING VALUES; MAGNETIC FIELDS; PHOTONS; SCALARS; STRING MODELS; STRING THEORY; UNIVERSE