Using perturbative least action to recover cosmological initial conditions

Citation
Dm. Goldberg et Dn. Spergel, Using perturbative least action to recover cosmological initial conditions, ASTROPHYS J, 544(1), 2000, pp. 21-29
Citations number
21
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
544
Issue
1
Year of publication
2000
Part
1
Pages
21 - 29
Database
ISI
SICI code
0004-637X(20001120)544:1<21:UPLATR>2.0.ZU;2-T
Abstract
We introduce a new method for generating initial conditions consistent with highly nonlinear observations of density and velocity fields. Using a vari ant of the least action method, called perturbative least action (PLA), we show that it is possible to generate several different sets of initial cond itions, 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.