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Using Perturbative Least Action to Recover Cosmological Initial Conditions
Journal article   Open access   Peer reviewed

Using Perturbative Least Action to Recover Cosmological Initial Conditions

David M Goldberg and David N Spergel
The Astrophysical journal, v 544(1)
19 Dec 1999
DOI: https://doi.org/10.1086/317182
url
https://doi.org/10.1086/317182View
Published, Version of Record (VoR)Maybe Open Access (Publisher Bronze),  Open

Abstract

Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Physics - Earth and Planetary Astrophysics Physics - High Energy Astrophysical Phenomena Physics - Instrumentation and Methods for Astrophysics Physics - Solar and Stellar Astrophysics
Astrophys.J.544:21,2000 We introduce a new method for generating initial conditions consistent with highly nonlinear observations of density and velocity fields. Using a variant of the Least Action method, called Perturbative Least Action (PLA), we show that it is possible to generate several different sets of initial conditions, each of which will satisfy a set of highly nonlinear observational constraints at the present day. We then discuss a code written to test and apply this method and present the results of several simulations.

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Astronomy & Astrophysics
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