Lagrangian reconstruction of cosmic velocity fields
Abstract
We discuss a Lagrangian reconstruction method of the velocity field from galaxy redshift catalog that takes its root in the Euler equation. This results in a ``functional'' of the velocity field which must be minimized. This is helped by an algorithm solving the minimization of cost-flow problems. The results obtained by applying this method to cosmological problems are shown and boundary effects happening in real observational cases are then discussed. Finally, a statistical model of the errors made by the reconstruction method is proposed.
Keywords
Cite
@article{arxiv.0801.4208,
title = {Lagrangian reconstruction of cosmic velocity fields},
author = {G. Lavaux},
journal= {arXiv preprint arXiv:0801.4208},
year = {2009}
}
Comments
5 pages, 5 figures, contribution to the conference "Euler's Equations: 250 Years On" (see http://www.obs-nice.fr/etc7/EE250/); to be published in a special issue of Physica D containing the proceedings of that conference