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Double Inflation in Supergravity and the Boomerang Observations
Toshiyuki Kanazawa, Masahiro Kawasaki, Naoshi Sugiyama +1
One of the biggest mystery of the recent observation of cosmic microwave background anisotropies by the boomerang team is insignificance of the second acoustic peak in the angular…
Nonlinear Evolution of Very Small Scale Cosmological Baryon Perturbations at Recombination
Guo-Chin Liu, Kazuhiro Yamamoto, Naoshi Sugiyama +1
The evolution of baryon density perturbations on very small scales is investigated. In particular, the nonlinear growth induced by the radiation drag force from the shear velocity…
MeV-scale Reheating Temperature and Thermalization of Neutrino Background
M. Kawasaki, K. Kohri, Naoshi Sugiyama
The late-time entropy production by the massive particle decay induces the various cosmological effects in the early epoch and modify the standard scenario. We investigate the ther…
Non-uniform reionization by galaxies and its effect on the cosmic microwave backgroun
A. J. Benson, Adi Nusser, Naoshi Sugiyama +1
We present predictions for the reionization of the intergalactic medium by stars in high-redshift galaxies. We calculate ionizing luminosities of galaxies, including the effects of…