Constraining Dark Energy with Type Ia Supernovae and Large-Scale Structure

1999/01/15 by Saul Perlmutter, S. Perlmutter, Michael S. Turner +1 · 22 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Gamma-ray bursts and supernovae #astro-ph #hep-ph

paper · pdf · doi:10.1103/physrevlett.83.670

published as Phys.Rev.Lett.83:670-673,1999 · 5 pages Revtex with 2 eps figures, submitted to Phys. Rev. Lett Minor changes to references

arxiv created 1999/01/15 · openalex publication_date 1999/07/26 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

Measurements of the distances to type Ia supernovae have produced strong evidence that the expansion of the Universe is accelerating, implying the existence of a nearly uniform component of dark energy with negative pressure. We show that constraints to this mysterious component based upon large-scale structure nicely complement the SN Ia data, and that together they require \ensuremathΩ_X\phantom\rule0ex0ex=\phantom\rule0ex0ex\ensuremathρ_X/\ensuremathρ_crit\ensuremath∈(0.6,0.7) and w\phantom\rule0ex0ex=\phantom\rule0ex0exp_X/\ensuremathρ_X<\ensuremath-0.6 ( 95% C.L.), for the favored flat Universe. Other cosmological data support this conclusion. The simplest explanation, a cosmological constant, is consistent with this, while some of the other possibilities are not.

Citations

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Cosmology in a String-Dominated Universe
• Cosmological consequences of a rolling homogeneous scalar field

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• Physical cosmology [wikipedia]