no code implementations • 24 Dec 2020 • Maresuke Shiraishi, Atsushi Taruya, Teppei Okumura, Kazuyuki Akitsu
We show an efficient way to compute wide-angle or all-sky statistics of galaxy intrinsic alignment in three-dimensional configuration space.
Cosmology and Nongalactic Astrophysics
1 code implementation • 17 Jul 2020 • Gong-Bo Zhao, Yuting Wang, Atsushi Taruya, Weibing Zhang, Hector Gil-Marin, Arnaud de Mattia, Ashley J. Ross, Anand Raichoor, Cheng Zhao, Will J. Percival, Shadab Alam, Julian E. Bautista, Etienne Burtin, Chia-Hsun Chuang, Kyle S. Dawson, Jean-Paul Kneib, Kazuya Koyama, Helion du Mas des Bourboux, Eva-Maria Mueller, Jeffrey A. Newman, John A. Peacock, Graziano Rossi, Vanina Ruhlmann-Kleider, Donald P. Schneider, Arman Shafieloo
We perform a joint BAO and RSD analysis using the eBOSS DR16 LRG and ELG samples in the redshift range of $z\in[0. 6, 1. 1]$, and detect a RSD signal from the cross power spectrum at a $\sim4\sigma$ confidence level, i. e., $f\sigma_8=0. 317\pm0. 080$ at $z_{\rm eff}=0. 77$.
Cosmology and Nongalactic Astrophysics
no code implementations • 27 Dec 2018 • Toshiya Namikawa, Benjamin Bose, François R. Bouchet, Ryuichi Takahashi, Atsushi Taruya
Following on an earlier paper, we test analytical predictions of the CMB lensing bi-spectrum against full-sky lensing simulations, and discuss their validity and limitation in detail.
Cosmology and Nongalactic Astrophysics
1 code implementation • 23 Oct 2018 • Ken Osato, Takahiro Nishimichi, Francis Bernardeau, Atsushi Taruya
We study the accuracy with which cosmological parameters can be determined from real space power spectrum of matter density contrast at weakly nonlinear scales using analytical approaches.
Cosmology and Nongalactic Astrophysics
1 code implementation • 13 Aug 2012 • Ryuichi Takahashi, Masanori Sato, Takahiro Nishimichi, Atsushi Taruya, Masamune Oguri
The simulation results are used to re-calibrate the fitting parameters of the halofit model so as to reproduce small-scale power spectra of the $N$-body simulations, while keeping the precision at large scales.
Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
1 code implementation • 6 Aug 2012 • Atsushi Taruya, Francis Bernardeau, Takahiro Nishimichi, Sandrine Codis
The fortran program with which direct and fast calculations of power spectra can be done, RegPT, is publicly released as part of this paper.
Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
