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REVISING THE HALOFIT MODEL FOR THE NONLINEAR MATTER POWER SPECTRUM

- R. Takahashi, Masanori Sato, T. Nishimichi, A. Taruya, M. Oguri
- Physics
- 13 August 2012

Based on a suite of state-of-the-art high-resolution N-body simulations, we revisit the so-called halofit model as an accurate fitting formula for the nonlinear matter power spectrum. While the… Expand

Baryon Acoustic Oscillations in 2D: Modeling Redshift-space Power Spectrum from Perturbation Theory

- A. Taruya, T. Nishimichi, S. Saito
- Physics
- 3 June 2010

We present an improved prescription for the matter power spectrum in redshift space taking proper account of both nonlinear gravitational clustering and redshift distortion, which are of particular… Expand

Direct and fast calculation of regularized cosmological power spectrum at two-loop order

- A. Taruya, F. Bernardeau, T. Nishimichi, S. Codis
- Physics
- 6 August 2012

We present a specific prescription for the calculation of cosmological power spectra, exploited here at two-loop order in perturbation theory, based on the multipoint propagator expansion. In this… Expand

Full-sky Gravitational Lensing Simulation for Large-area Galaxy Surveys and Cosmic Microwave Background Experiments

- R. Takahashi, T. Hamana,
+4 authors Kosei Shiroyama - Physics
- 5 June 2017

We present 108 full-sky gravitational lensing simulation data sets generated by performing multiple-lens plane ray-tracing through high-resolution cosmological N-body simulations. The data sets… Expand

Nonlinear evolution of baryon acoustic oscillations from improved perturbation theory in real and redshift spaces

- A. Taruya, T. Nishimichi, S. Saito, T. Hiramatsu
- Physics
- 2 June 2009

We study the nonlinear evolution of baryon acoustic oscillations in the matter power spectrum and correlation function from the improved perturbation theory (PT). Based on the framework of… Expand

Simultaneous constraints on the growth of structure and cosmic expansion from the multipole power spectra of the SDSS DR7 LRG sample

- A. Oka, S. Saito, T. Nishimichi, A. Taruya, Kazuhiro Yamamoto
- Physics
- 10 October 2013

The anisotropic galaxy clustering on large scales provides us with a unique opportunity to probe into the gravity theory through the redshift-space distortions (RSDs) and the Alcock-Paczynski effect.… Expand

SIMULATIONS OF BARYON ACOUSTIC OSCILLATIONS. II. COVARIANCE MATRIX OF THE MATTER POWER SPECTRUM

- R. Takahashi, N. Yoshida,
+7 authors A. Taruya - Physics
- 3 February 2009

We use 5000 cosmological N-body simulations of 1 h−3 Gpc3 box for the concordance ΛCDM model in order to study the sampling variances of a nonlinear matter power spectrum. We show that the… Expand

Constraints on the Mass–Richness Relation from the Abundance and Weak Lensing of SDSS Clusters

- R. Murata, T. Nishimichi,
+5 authors K. Osato - Physics
- 6 July 2017

We constrain the scaling relation between optical richness (λ) and halo mass (M) for a sample of Sloan Digital Sky Survey (SDSS) red-sequence Matched-filter Probabilistic Percolation (redMaPPer)… Expand

Modeling Nonlinear Evolution of Baryon Acoustic Oscillations: Convergence Regime of $N$-body Simulations and Analytic Models

- T. Nishimichi, Akihito Shirata,
+10 authors K. Yoshikawa - Physics
- 5 October 2008

We used a series of cosmological N-body simulations and various analytic models to study the evolution of the matter power spectrum in real space in a A cold dark matter universe. We compared the… Expand

Baryon Acoustic Oscillations in 2D II: Redshift-space halo clustering in N-body simulations

- T. Nishimichi, A. Taruya
- Physics
- 22 June 2011

We measure the halo power spectrum in redshift space from cosmological $N$-body simulations, and test the analytical models of redshift distortions particularly focusing on the scales of baryon… Expand

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