Lagrangian reconstruction of cosmic velocity fields

被引：6
|
作者：
Lavaux, Guilhem [1 ,2 ,3 ]
机构：
[1] Inst Astrophys Paris, F-75015 Paris, France
[2] Univ Paris 06, F-75252 Paris 05, France
[3] Univ Paris 11, Orsay, France
来源：
PHYSICA D-NONLINEAR PHENOMENA | 2008年 / 237卷 / 14-17期
关键词：
cosmology; velocity field reconstruction; numerical method; statistics;
D O I：
10.1016/j.physd.2008.02.016
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
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. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：2139 / 2144
页数：6
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