GENERAL RELATIVISTIC EFFECTS ON NONLINEAR POWER SPECTRA

Journal Article · Thu Jan 20 00:00:00 EST 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/727/1/22· OSTI ID:21567617

Jeong, Donghui ^[1]; Gong, Jinn-Ouk ^[2]; Noh, Hyerim ^[3]; Hwang, Jai-chan ^[4]

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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)

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.

• OSTI ID: 21567617
• Journal Information: Astrophysical Journal, Vol. 727, Issue 1; Other Information: DOI: 10.1088/0004-637X/727/1/22; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CORRECTIONS
COSMOLOGY
DISTURBANCES
EINSTEIN FIELD EQUATIONS
EVOLUTION
FLUIDS
NONLINEAR PROBLEMS
RELATIVISTIC RANGE
SPECTRA
ENERGY RANGE
EQUATIONS
FIELD EQUATIONS