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Published October 2012 | Submitted
Journal Article Open

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

Abstract

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.

Additional Information

© 2012 Institute of Physics. Received June 4, 2012. Revised August 16, 2012. Accepted September 17, 2012. Published October 16, 2012. DB and RM are supported by the South African Square Kilometre Array Project. RM is supported by the STFC (U.K.) (grant no. ST/H002774/1). RM and CC are supported by the National Research Foundation (NRF, South Africa). DB, RM and CC are supported by a Royal Society (U.K.)/ NRF (S.A.) exchange grant. Part of the research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.

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