Beyond the plane-parallel and Newtonian approach: wide-angle redshift distortions and convergence in general relativity

Journal Article · Mon Oct 01 00:00:00 EDT 2012 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2012/10/025· OSTI ID:22279634

Bertacca, Daniele; Maartens, Roy ^[1]; Raccanelli, Alvise ^[2]; Clarkson, Chris ^[3]

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1. Physics Department, University of the Western Cape, Cape Town 7535 (South Africa)
2. Jet Propulsion Laboratory, California Institute of Technology, Pasadena CA 91109 (United States)
3. Centre for Astrophysics, Cosmology and Gravitation and Department of Mathematics and Applied Mathematics, University of Cape Town, Cape Town 7701 (South Africa)

We extend previous analyses of wide-angle correlations in the galaxy power spectrum in redshift space to include all general relativistic effects. These general relativistic corrections to the standard approach become important on large scales and at high redshifts, and they lead to new terms in the wide-angle correlations. We show that in principle the new terms can produce corrections of nearly 10% on Gpc scales over the usual Newtonian approximation. General relativistic corrections will be important for future large-volume surveys such as SKA and Euclid, although the problem of cosmic variance will present a challenge in observing this.

• OSTI ID: 22279634
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2012, Issue 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
APPROXIMATIONS
ASTROPHYSICS
CORRECTIONS
CORRELATIONS
COSMOLOGY
ENERGY SPECTRA
GALAXIES
GENERAL RELATIVITY THEORY
RED SHIFT
RELATIVISTIC RANGE
SPACE