New constraints from high redshift supernovae and lensing statistics upon scalar field cosmologies

Ioav Waga and Joshua A. Frieman
Phys. Rev. D 62, 043521 – Published 26 July 2000
PDFExport Citation


We explore the implications of gravitationally lensed quasistellar objects and high-redshift SNe Ia observations for spatially flat cosmological models in which a classically evolving scalar field currently dominates the energy density of the Universe. We consider two representative scalar field potentials that give rise to effective decaying Λ (“quintessence”) models: pseudo Nambu-Goldstone bosons [V(φ)=M4(1+cos(φ/f))] and an inverse power-law potential [V(φ)=M4+αφα]. We show that a large region of parameter space is consistent with current data if Ωm0>0.15. On the other hand, a higher lower bound for the matter density parameter suggested by large-scale galaxy flows, Ωm0>0.3, considerably reduces the allowed parameter space, forcing the scalar field behavior to approach that of a cosmological constant.

  • Received 18 January 2000


©2000 American Physical Society

Authors & Affiliations

Ioav Waga

  • Universidade Federal do Rio de Janeiro, Instituto de Física, Rio de Janeiro, RJ, 21945-970, Brazil

Joshua A. Frieman

  • NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510
  • Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637

References (Subscription Required)

Click to Expand

Vol. 62, Iss. 4 — 15 August 2000

Reuse & Permissions
Access Options
General Relativity Still Making Waves
September 24, 2015

Clifford Will discusses the importance of Einstein’s general theory of relativity and its relevance for physics research today.

APS and CERN Sign Open Access Agreement for SCOAP3

APS and CERN, the host organization of SCOAP3 (Sponsoring Consortium for Open Access Publishing in Particle Physics), have signed an agreement to make the high-energy physics (HEP) articles published in three leading APS journals open access beginning January 1, 2018. This agreement acts to support the publishing of open access content for wider benefit of the HEP community.

General Relativity
2015 - General Relativity’s Centennial

The editors of the Physical Review journals have curated a collection of landmark papers on General Relativity to celebrate its centennial. These papers are currently free to read.

Authorization Required




Sign up to receive regular email alerts from Physical Review D

Log In



Article Lookup

Paste a citation or DOI

Enter a citation