10 citations · 13 across the 7 of their papers we have counts for
5 papers · 1 filter
Time dependence of cosmological and inflationary parameters in slow-roll inflation
Shiro Hirai, Tomoyuki Takami
The dependence of cosmological and inflationary parameters on time during the last 60 e-folds in inflation is investigated using a slow-roll inflation model. The time dependence of…
Effect of initial condition of inflation on power and angular power spectra in finite slow-roll inflation
Shiro Hirai, Tomoyuki Takami
The effect of the initial condition of inflation on the power spectra of scalar and tensor perturbations is estimated assuming a slow-roll inflation model. By defining a more gener…
Angular Power Spectrum in Modular Invariant Inflation Model
Mitsuo J. Hayashi, Shiro Hirai, Tomoyuki Takami +3
We propose a scalar potential of inflation, motivated by modular invariant supergravity, and compute the angular power spectra of the adiabatic density perturbations that result fr…
Effect of the length of inflation on angular TT and TE power spectra in power-law inflation
Shiro Hirai, Tomoyuki Takami
The effect of the length of inflation on the power spectra of scalar and tensor perturbations is estimated using the power-law inflation model with a scale factor of a(t) = t^q. Co…
Length of inflation and WMAP data in the case of power-law inflation
Shiro Hirai, Tomoyuki Takami
The effect of the length of inflation on the power spectra of scalar and tensor perturbations is estimated using the power-law inflation model with a scale factor of a(t) = t^q. Co…