CMB probes on the correlated axion isocurvature perturbation

Kenji Kadota, Jinn Ouk Gong, Kiyotomo Ichiki, Takahiko Matsubara

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11 Scopus citations


We explore the possible cosmological consequence of the gravitational coupling between the inflaton and axion-like fields. In view of the forthcoming cosmic microwave background (CMB) polarization and lensing data, we study the sensitivity of the CMB data on the cross-correlation between the curvature and axion isocurvature perturbations. Through a concrete example, we illustrate the explicit dependence of the scale dependent cross-correlation power spectrum on the axion parameters.

Original languageEnglish
Article number026
JournalJournal of Cosmology and Astroparticle Physics
Issue number3
StatePublished - 13 Mar 2015

Bibliographical note

Publisher Copyright:
© 2015 IOP Publishing Ltd and Sissa Medialab srl.


  • Axions
  • Cosmological parameters from CMBR


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