Atsushi J. Nishizawa

Simulations of Baryon Acoustic Oscillations II: Covariance matrix of the matter power spectrum (2009)

Takahashi, Ryuichi, Yoshida, Naoki, Takada, Masahiro, Matsubara, Takahiko, Sugiyama, Naoshi, Kayo, Issha, ...

We use 5000 cosmological N-body simulations of 1(Gpc/h)^3 box for the concordance LCDM model in order to study the sampling variances of nonlinear matter power spectrum. We show that the non-Gaussian...

Cosmic Microwave Background--Weak Lensing Correlation: Analytical and Numerical Study of Non-linearity and Implications for Dark Energy (2007)

Nishizawa, Atsushi J., Komatsu, Eiichiro, Yoshida, Naoki, Takahashi, Ryuichi, Sugiyama, Naoshi

Non-linear evolution of density fluctuations yields secondary anisotropies in the cosmic microwave background (CMB), which are correlated with the same density fluctuations that can be measured by...