1.1k citations · 5.6k across the 84 of their papers we have counts for
3 papers · 1 filter
Bias-Hardened CMB Lensing
Toshiya Namikawa, Duncan Hanson, Ryuichi Takahashi
We present new methods for lensing reconstruction from CMB temperature fluctuations which have smaller mean-field and reconstruction noise bias corrections than current lensing est…
Revising the Halofit Model for the Nonlinear Matter Power Spectrum
Ryuichi Takahashi, Masanori Sato, Takahiro Nishimichi +2
Based on a suite of state-of-the-art high-resolution -body simulations, we revisit the so-called halofit model (Smith et al. 2003) as an accurate fitting formula for the nonline…
Weak Lensing by Line-of-sight Halos as the Origin of Flux-ratio Anomalies in Quadruply Lensed QSOs
Kaiki Taro Inoue, Ryuichi Takahashi
We explore the weak lensing effect by line-of-sight halos and sub-halos with a mass of M < 10^7 solar mass in QSO-galaxy strong lens systems with quadruple images in a concordant L…