Critical constraint on inflationary magnetogenesis

Tomohiro Fujita, Shuichiro Yokoyama

研究成果: Article査読

36 被引用数 (Scopus)

抄録

Recently, there are several reports that the cosmic magnetic fields on Mpc scale in void region is larger than ∼ 10-15G with an uncertainty of a few orders from the current blazar observations. On the other hand, in inflationary magnetogenesis models, additional primordial curvature perturbations are inevitably produced from iso-curvature perturbations due to generated electromagnetic fields. We explore such induced curvature perturbations in a model independent way and obtained a severe upper bound for the energy scale of inflation from the observed cosmic magnetic fields and the observed amplitude of the curvature perturbation , as ρinf1/4 < 300MeV × (Bobs/10-15G)-1 where Bobs is the strength of the magnetic field at present. Therefore, without a dedicated low energy inflation model or an additional amplification of magnetic fields after inflation, inflationary magnetogenesis on Mpc scale is generally incompatible with CMB observations.

本文言語English
論文番号013
ジャーナルJournal of Cosmology and Astroparticle Physics
2014
3
DOI
出版ステータスPublished - 2014 3
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学

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