General relativistic effects on nonlinear power spectra

Donghui Jeong, Jinn Ouk Gong, Hyerim Noh, Jai Chan Hwang

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

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.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume727
Issue number1
DOIs
StatePublished - Jan 20 2011

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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