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

Tetsutaro Higaki, Kazunori Nakayama, Fuminobu Takahashi

研究成果: Article査読

12 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号030
ジャーナルJournal of Cosmology and Astroparticle Physics
2013
9
DOI
出版ステータスPublished - 2013 9

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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