Constraining dark energy with SNe Ia and large-scale structure

Journal Article · Fri Jan 01 00:00:00 EST 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.83.670· OSTI ID:771790

Perlmutter, Saul; Turner, Michael S; White, Martin

Measurements of the distances to SNe Ia 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 together they require {Omega}{sub {Chi}} = {rho}{sub {Chi}}/{rho}{sub crit} {epsilon} (0.6, 0.7) and w = p{sub {Chi}}/{rho}{sub {Chi}} < {minus}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.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Director, Office of Science. Office of High Energy and Nuclear Physics. Division of High Energy Physics; National Aeronautics and Space Administration (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 771790
• Report Number(s): LBNL-45184; PRLTAO; R&D Project: 419401; TRN: AH200104%%550
• Journal Information: Physical Review Letters, Vol. 83, Issue 4; Other Information: PBD: 1 Jan 1999; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMOLOGICAL CONSTANT
UNIVERSE
ACCELERATION
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