242 citations · 2.3k across the 31 of their papers we have counts for
6 papers · 1 filter
Gravitational waves induced by scalar perturbations as probes of the small-scale primordial spectrum
Keisuke Inomata, Tomohiro Nakama
Compared to primordial perturbations on large scales, roughly larger than megaparsec, those on smaller scales are not severely constrained. We revisit the issue of probing smal…
Chiral photons from chiral gravitational waves
Keisuke Inomata, Marc Kamionkowski
We show that a parity-breaking uniform (averaged over all directions on the sky) circular polarization of amplitude can be induced…
Circular polarization of the cosmic microwave background from vector and tensor perturbations
Keisuke Inomata, Marc Kamionkowski
Circular polarization of the cosmic microwave background (CMB) can be induced by Faraday conversion of the primordial linearly polarized radiation as it propagates through a birefr…
Big Bang Nucleosynthesis Constraint on Baryonic Isocurvature Perturbations
Keisuke Inomata, Masahiro Kawasaki, Alexander Kusenko +1
We study the effect of large baryonic isocurvature perturbations on the abundance of deuterium (D) synthesized in big bang nucleosynthesis (BBN). We found that large baryonic isocu…
Exploring compensated isocurvature perturbations with CMB spectral distortion anisotropies
Taku Haga, Keisuke Inomata, Atsuhisa Ota +1
We develop a linear perturbation theory for the spectral -distortions of the cosmic microwave background (CMB). The -distortions generated during the recombination epoch are…
Primordial black holes and uncertainties in the choice of the window function
Kenta Ando, Keisuke Inomata, Masahiro Kawasaki
Primordial black holes (PBHs) can be produced by the perturbations that exit the horizon during inflationary phase. While inflation models predict the power spectrum of the perturb…