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Title: GENERAL RELATIVISTIC EFFECTS ON NONLINEAR POWER SPECTRA

The nonlinear nature of Einstein's equation introduces genuine relativistic higher order corrections to the usual Newtonian fluid equations describing the evolution of cosmological perturbations. We study the effect of such novel nonlinearities on the next-to-leading order matter and velocity power spectra for the case of a pressureless, irrotational fluid in a flat Friedmann background. We find that pure general relativistic corrections are negligibly small over all scales. Our result guarantees that, in the current paradigm of standard cosmology, one can safely use Newtonian cosmology even in nonlinear regimes.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. California Institute of Technology, Pasadena, CA 91125-1700 (United States)
  2. Instituut-Lorentz for Theoretical Physics, Universiteit Leiden, 2333 CA Leiden (Netherlands)
  3. Korea Astronomy and Space Science Institute, Daejeon 305-348 (Korea, Republic of)
  4. Department of Astronomy and Atmospheric Sciences, Kyungpook National University, Daegu 702-701 (Korea, Republic of)
Publication Date:
OSTI Identifier:
21567617
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 727; Journal Issue: 1; Other Information: DOI: 10.1088/0004-637X/727/1/22
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CORRECTIONS; COSMOLOGY; DISTURBANCES; EINSTEIN FIELD EQUATIONS; EVOLUTION; FLUIDS; NONLINEAR PROBLEMS; RELATIVISTIC RANGE; SPECTRA ENERGY RANGE; EQUATIONS; FIELD EQUATIONS