On the systematic errors of cosmological-scale gravity tests using redshift-space distortion: non-linear effects and the halo bias
Takashi Ishikawa,Tomonori Totani,Tomonori Totani,Takahiro Nishimichi,Takahiro Nishimichi,Ryuichi Takahashi,Naoki Yoshida,Naoki Yoshida,Motonari Tonegawa,Motonari Tonegawa +9 more
TLDR
In this article, the systematic errors on measurements of the structure growth-rate parameter, fσ8, induced by nonlinear effects and the halo bias with respect to the dark matter distribution, were estimated by using halo catalogues from 40 realizations of 3.4 × 10 8 comoving h −3 Mpc 3 cosmological N-body simulations.Abstract:
Redshift-space distortion (RSD) observed in galaxy redshift surveys is a powerful tool to test gravity theories on cosmological scales, but the systematic uncertainties must carefully be examined for future surveys with large statistics. Here we employ various analytic models of RSD and estimate the systematic errors on measurements of the structure growth-rate parameter, fσ8, induced by non-linear effects and the halo bias with respect to the dark matter distribution, by using halo catalogues from 40 realizations of 3.4 × 10 8 comoving h −3 Mpc 3 cosmological N-body simulations. We consider hypothetical redshift surveys at redshifts z = 0.5, 1.35 and 2, and different minimum halo mass thresholds in the range of 5.0 × 10 11 –2.0 × 10 13 h −1 M� . We find that the systematic error of fσ8 is greatly reduced to ∼5percent level, when a recently proposed analytical formula of RSD that takes into account the higher order coupling between the density and velocity fields is adopted, with a scaledependent parametric bias model. Dependence of the systematic error on the halo mass, the redshift and the maximum wavenumber used in the analysis is discussed. We also find that the Wilson–Hilferty transformation is useful to improve the accuracy of likelihood analysis when only a small number of modes are available in power spectrum measurements.read more
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The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Testing gravity with redshift-space distortions using the power spectrum multipoles
Florian Beutler,Shun Saito,Hee-Jong Seo,Hee-Jong Seo,Jon Brinkmann,Kyle S. Dawson,Daniel J. Eisenstein,Andreu Font-Ribera,Shirley Ho,Cameron K. McBride,Francesco Montesano,Will J. Percival,Ashley J. Ross,Nicholas P. Ross,Nicholas P. Ross,Lado Samushia,David J. Schlegel,Ariel G. Sánchez,Jeremy L. Tinker,Benjamin A. Weaver +19 more
TL;DR: In this paper, the authors analyzed the anisotropic clustering of the Baryon Oscillation Spectroscopic Survey (BOSS) CMASS Data Release 11 (DR11) sample, which consists of 690 827 galaxies in the redshift range 0.43 ± 0.7 and has a sky coverage of 8498 deg^2.
Journal ArticleDOI
The Subaru FMOS galaxy redshift survey (FastSound). IV. New constraint on gravity theory from redshift space distortions at z ∼ 1.4
Teppei Okumura,Chiaki Hikage,Tomonori Totani,Motonari Tonegawa,Hiroyuki Okada,Karl Glazebrook,Chris Blake,Pedro G. Ferreira,Surhud More,Atsushi Taruya,Atsushi Taruya,Shinji Tsujikawa,Masayuki Akiyama,Gavin Dalton,Gavin Dalton,Tomotsugu Goto,Takashi Ishikawa,Fumihide Iwamuro,Takahiko Matsubara,Takahiro Nishimichi,Kouji Ohta,Ikkoh Shimizu,Ryuichi Takahashi,Naruhisa Takato,Naoyuki Tamura,Kiyoto Yabe,Naoki Yoshida +26 more
TL;DR: In this article, the authors measured the redshift-space correlation function from a spectroscopic sample of 2783 emission line galaxies from the FastSound survey and obtained the first cosmological study at such high redshifts.
Journal ArticleDOI
Simultaneous constraints on the growth of structure and cosmic expansion from the multipole power spectra of the SDSS DR7 LRG sample
Akira Oka,Shun Saito,Takahiro Nishimichi,Atsushi Taruya,Atsushi Taruya,Atsushi Taruya,Kazuhiro Yamamoto +6 more
TL;DR: In this paper, the authors examined the validity of a theoretical model for the non-linear RSDs using mock subhalo catalogues from N-body simulations, which are constructed to match with the observed multipole power spectra.
Journal ArticleDOI
A perturbative approach to the redshift space power spectrum: beyond the Standard Model
Benjamin Bose,Kazuya Koyama +1 more
TL;DR: In this article, the power spectrum in redshift space based on standard perturbation theory (SPT) at 1-loop order was developed to produce a power spectrum for a wide range of modified gravity and dark energy models.
Journal ArticleDOI
Nonlinear contributions to angular power spectra
TL;DR: In this paper, the effects of nonlinear density and redshift space distortion (RSD) on the angular power spectrum were analyzed using a flat-sky approximation, and the results of different perturbative and nonperturbative approaches were compared.
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