2017/02/28 by Kohei Kamada, Yuichiro Nakai
Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Axion #Cosmology #Cosmology and Gravitation Theories #Coupling (piping) #Dark Matter and Cosmic Phenomena #Dark matter #Galaxy #Magnetic field #Particle physics #Physics #Production (economics) #Quantum mechanics #astro-ph.CO #hep-ph
paper · pdf · doi:10.1103/physrevd.96.023537
published as Phys. Rev. D 96, 023537 (2017) · 7 pages, 2 figures, comments welcome; v2: extended discussions, comments and references added, matches version published in PRD
openalex publication_date 2017/07/28 · arxiv created 2017/08/07 · arxiv updated 2017/08/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Production of axionlike particles (ALPs) by primordial magnetic fields may have significant impacts on cosmology. We discuss the production of ALPs in the presence of the primordial magnetic fields. We find a region of the ALP mass and photon coupling which realizes the observed properties of the dark matter with appropriate initial conditions for the magnetic fields. This region may be interesting in light of recent indications for the 3.5 keV lines from galaxy clusters. For a small axion mass, a region of previously allowed parameter spaces is excluded by overproduction of ALPs as a hot/warm dark matter component. Since the abundance of ALPs strongly depends on the initial conditions of primordial magnetic fields, our results provide implications for scenarios of magnetogenesis.