Prospects of determination of reheating temperature after inflation by DECIGO

Sachiko Kuroyanagi, Kazunori Nakayama, Jun'ichi Yokoyama

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


If the tensor-to-scalar ratio r of cosmological perturbations takes a large value r∼0.1, which may be inferred from the recent BICEP2 result, we can hope to determine thermal history, in particular, the reheating temperature, TR, after inflation by space-based laser interferometers. It is shown that upgraded and upshifted versions of DECIGO may be able to determine TR if it lies in the range 6×106<TR <5×107GeV and 3×107<TR<2×108GeV, respectively. Although these ranges include predictions of some currently plausible inflation models, because each specification can probe TR of a range of at most a decade, we should determine the specifications of DECIGO taking full account of the constraints on inflation models to be obtained by near-future observations of temperature anisotropy and B-model polarization of the cosmic microwave background radiation.

Original languageEnglish
JournalProgress of Theoretical and Experimental Physics
Issue number1
Publication statusPublished - 2014 Oct 10
Externally publishedYes


  • E02
  • E75
  • E80

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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