33 citations · 38 across the 2 of their papers we have counts for
4 papers
Probing the primordial Universe with 21-cm line from cosmic dawn/epoch of reionization
Teppei Minoda, Shohei Saga, Tomo Takahashi +4
In the most distant reaches of the Universe, the 21-cm hyperfine transition in neutral hydrogen provides one of the only available tracers of large-scale structure. A number of ins…
Analytical approach to core-halo structure of fuzzy dark matter
Atsushi Taruya, Shohei Saga
Ultralight bosonic dark matter called fuzzy dark matter (FDM) has attracted much attention as an alternative to the cold dark matter. An intriguing feature of the FDM model is the…
Observable cosmological vector mode in the dark ages
Shohei Saga
The second-order vector mode is inevitably induced from the coupling of first-order scalar modes in cosmological perturbation theory and might hinder a possible detection of primor…
Impact of anisotropic stress of free-streaming particles on gravitational waves induced by cosmological density perturbations
Shohei Saga, Kiyotomo Ichiki, Naoshi Sugiyama
Gravitational waves (GWs) are inevitably induced at second-order in cosmological perturbations through non-linear couplings with first order scalar perturbations, whose existence i…