Journal
ASTROPHYSICAL JOURNAL
Volume 534, Issue 2, Pages L117-L121Publisher
IOP Publishing Ltd
DOI: 10.1086/312679
Keywords
cosmology : theory; gravitation; large-scale structure of universe
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We have developed a generalization of the Zeldovich approximation that is exact in a wide variety of situations, including planar, spherical, and cylindrical symmetries. We have shown that this generalization, which we carl the complete Zeldovich approximation (CZA), is exact to second order at an arbitrary point within any field. For Gaussian fields, the third-order error has been obtained and shown to be very small. For statistical purposes, the CZA leads to results exact to the third order.
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