Universal upper limit on inflation energy scale from cosmic magnetic field

Tomohiro Fujita*, Shinji Mukohyama

*この研究の対応する著者

研究成果: Article査読

72 被引用数 (Scopus)

抄録

Recently observational lower bounds on the strength of cosmic magnetic fields were reported, based on γ-ray flux from distant blazars. If inflation is responsible for the generation of such magnetic fields then the inflation energy scale is bounded from above as ρ inf 1/4 < 2.5 × 10 -7M Pl × (B obs/10 -15G) -2 in a wide class of inflationary magnetogenesis models, where B obs is the observed strength of cosmic magnetic fields. The tensor-to-scalar ratio is correspondingly constrained as r < 10 -19 × (B obs/10 -15G) -8. Therefore, if the reported strength B obs 10 -15G is confirmed and if any signatures of gravitational waves from inflation are detected in the near future, then our result indicates some tensions between inflationary magnetogenesis and observations.

本文言語English
論文番号034
ジャーナルJournal of Cosmology and Astroparticle Physics
2012
10
DOI
出版ステータスPublished - 2012 10
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学

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