851 citations · 5.2k across the 133 of their papers we have counts for
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Constraints on warm dark matter from weak lensing in anomalous quadruple lenses
Kaiki Taro Inoue, Ryuichi Takahashi, Tomo Takahashi +1
We investigate the weak lensing effect by line-of-sight structures with a surface mass density of <~10^8 solar mass/arcsec^2 in QSO-galaxy quadruple lens systems. Using high-resolu…
Thermal Effects and Sudden Decay Approximation in the Curvaton Scenario
Naoya Kitajima, David Langlois, Tomo Takahashi +2
We study the impact of a temperature-dependent curvaton decay rate on the primordial curvature perturbation generated in the curvaton scenario. Using the familiar sudden decay appr…
Blue-tilted Tensor Spectrum and Thermal History of the Universe
Sachiko Kuroyanagi, Tomo Takahashi, Shuichiro Yokoyama
We investigate constraints on the spectral index of primordial gravitational waves (GWs), paying particular attention to a blue-tilted spectrum. Such constraints can be used to tes…
CMB distortion from primordial gravitational waves
Atsuhisa Ota, Tomo Takahashi, Hiroyuki Tashiro +1
We propose a new mechanism of generating the distortion in cosmic microwave background (CMB) originated from primordial gravitational waves. Such distortion is generated by…
Studying Inflation with Future Space-Based Gravitational Wave Detectors
Ryusuke Jinno, Takeo Moroi, Tomo Takahashi
Motivated by recent progress in our understanding of the -mode polarization of cosmic microwave background (CMB), which provides important information about the inflationary gra…
Probing Lepton Asymmetry with 21 cm Fluctuations
Kazunori Kohri, Yoshihiko Oyama, Toyokazu Sekiguchi +1
We investigate the issue of how accurately we can constrain the lepton number asymmetry xi_nu = mu_nu/T_nu in the Universe by using future observations of 21 cm line fluctuations a…