1.1k citations · 10k across the 165 of their papers we have counts for
8 papers · 1 filter
CMB lensing bi-spectrum: assessing analytical predictions against full-sky lensing simulations
Toshiya Namikawa, Benjamin Bose, François R. Bouchet +2
Cosmic microwave background (CMB) lensing is an integrated effect whose kernel is greater than half the peak value in the range . Measuring this effect offers a powerful too…
Perturbation theory challenge for cosmological parameters estimation: Matter power spectrum in real space
Ken Osato, Takahiro Nishimichi, Francis Bernardeau +1
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 app…
The one-loop matter bispectrum as a probe of gravity and dark energy
Benjamin Bose, Atsushi Taruya
Gravity-induced non-Gaussianity in the large-scale structure of the Universe, characterised by higher-order statistics such as the bispectrum (three-point cumulant), is expected to…
GridSPT: Grid-based calculation for perturbation theory of large-scale structure
Atsushi Taruya, Takahiro Nishimichi, Donghui Jeong
Perturbation theory (PT) calculation of large-scale structure has been used to interpret the observed non-linear statistics of large-scale structure at the quasi-linear regime. In…
The CMB lensing bi-spectrum as a probe of modified gravity theories
Toshiya Namikawa, François R. Bouchet, Atsushi Taruya
Cosmological structures grow differently in theories of gravity which are modified as compared to Einstein's General relativity (GR). Cosmic microwave background (CMB) fluctuation…
Lagrangian cosmological perturbation theory at shell-crossing
Shohei Saga, Atsushi Taruya, Stéphane Colombi
We consider the growth of primordial dark matter halos seeded by three crossed initial sine waves of various amplitudes. Using a Lagrangian treatment of cosmological gravitational…