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Modeling of weak lensing statistics. II. Configuration-space statistics
Patrick Valageas, Masanori Sato, Takahiro Nishimichi
We investigate the performance of an analytic model of the 3D matter distribution, which combines perturbation theory with halo models, for weak-lensing configuration-space statist…
Modeling of weak lensing statistics. I. Power spectrum and bispectrum
Patrick Valageas, Masanori Sato, Takahiro Nishimichi
We investigate the performance of an analytic model of the 3D matter distribution, which combines perturbation theory with halo models, for weak-lensing statistics. We compare our…
Baryon Acoustic Oscillations in 2D II: Redshift-space halo clustering in N-body simulations
Takahiro Nishimichi, Atsushi Taruya
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 scale…
Combining perturbation theories with halo models for the matter bispectrum
Patrick Valageas, Takahiro Nishimichi
We investigate how unified models should be built to be able to predict the matter-density bispectrum (and power spectrum) from very large to small scales and that are at the same…
Forecasting the Cosmological Constraints with Anisotropic Baryon Acoustic Oscillations from Multipole Expansion
Atsushi Taruya, Shun Saito, Takahiro Nishimichi
Baryon acoustic oscillations (BAOs) imprinted in the galaxy power spectrum can be used as a standard ruler to determine angular diameter distance and Hubble parameter at high redsh…
SUZAKU Observation of a New Merging Group of Galaxies at a Filamentary Junction
Hajime Kawahara, Hiroshi Yoshitake, Takahiro Nishimichi +1
We report on a new merging group of galaxies, Suzaku J1552+2739 at z ~ 0.08 revealed by a SUZAKU observation. The group was found by observing a junction of galaxy filaments optica…