Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· arXiv e-print (arXiv:astro-ph/0404319)
· References in the article
· Citations to the Article (15) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The Flatness Problem and Λ
Authors:
Lake, Kayll
Affiliation:
AA(Department of Physics, Queen's University, Kingston, Ontario, Canada, K7L 3N6)
Publication:
Physical Review Letters, vol. 94, Issue 20, id. 201102 (PhRvL Homepage)
Publication Date:
05/2005
Origin:
APS
PACS Keywords:
Fundamental problems and general formalism, Origin and formation of the Universe, Observational cosmology
DOI:
10.1103/PhysRevLett.94.201102
Bibliographic Code:
2005PhRvL..94t1102L

Abstract

By way of a complete integration of the Friedmann equations, in terms of observables, it is shown that for the cosmological constant Λ>0 there exist nonflat Friedmann-Lemaître-Robertson-Walker models for which the total density parameter Ω remains ˜1 throughout the entire history of the Universe. Further, it is shown that in a precise quantitative sense these models are not finely tuned. When observations are brought to bear on the theory, and, in particular, the Wilkinson microwave anisotropy probe observations, they confirm that we live in just such a universe. The conclusion holds when the classical notion of Λ is extended to dark energy.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
  New!

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints