Integrated Perturbation Theory and One-loop Power Spectra of Biased Tracers

2013/04/30 by Takahiko Matsubara · 1 citation
Physics and Astronomy · #astro-ph.CO

paper · pdf · doi:10.1103/physrevd.90.043537

published as Phys. Rev. D 90, 043537 (2014) · 21 pages, 10 figures, version accepted for publication in PRD

arxiv created 2014/08/08 · arxiv updated 2014/09/05

Abstract

General and explicit predictions from the integrated perturbation theory (iPT) for power spectra and correlation functions of biased tracers are derived and presented in the one-loop approximation. The iPT is a general framework of the nonlinear perturbation theory of cosmological density fields in presence of nonlocal bias, redshift-space distortions, and primordial non-Gaussianity. Analytic formulas of auto and cross power spectra of nonlocally biased tracers in both real and redshift spaces are derived and the results are comprehensively summarized. The main difference from previous formulas derived by the present author is to include effects of generally nonlocal Lagrangian bias and primordial non-Gaussianity, and the derivation method of the new formula is fundamentally different from the previous one. Relations to recent work on improved methods of nonlinear perturbation theory in literature are clarified and discussed.

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