Infrared Divergence of Pure Einstein Gravity Contributions to the Cosmological Density Power Spectrum

Hyerim Noh, Donghui Jeong, and Jai-chan Hwang
Phys. Rev. Lett. 103, 021301 – Published 10 July 2009
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Abstract

We probe the pure Einstein gravity contributions to the second-order density power spectrum. On the small scale, we discover that Einstein’s gravity contribution is negligibly small. This guarantees that Newton’s gravity is currently sufficient to handle the baryon acoustic oscillation scale. On the large scale, however, we discover that Einstein’s gavity contribution to the second-order power spectrum dominates the linear-order power spectrum. Thus, the pure Einstein gravity contribution appearing in the third-order perturbation leads to an infrared divergence in the power spectrum.

  • Figure
  • Received 16 March 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.021301

©2009 American Physical Society

Authors & Affiliations

Hyerim Noh1,*, Donghui Jeong2,3,†, and Jai-chan Hwang4,‡

  • 1Korea Astronomy and Space Science Institute, Daejon, Korea
  • 2Department of Astronomy, University of Texas at Austin, University Station, C1400, Austin, Texas 78712, USA
  • 3Texas Cosmology Center, University of Texas at Austin, University Station, C1400, Austin, Texas 78712, USA
  • 4Department of Astronomy and Atmospheric Sciences, Kyungpook National University, Taegu, Korea

  • *hr@kasi.re.kr
  • djeong@astro.as.utexas.edu
  • jchan@knu.ac.kr

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Issue

Vol. 103, Iss. 2 — 10 July 2009

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