Tangential Large Scale Structure Evidence for a Low Density Universe

Details Tangential Large Scale Structure Evidence for a Low Density Universe Tangential Large Scale Structure Evidence for a Low Density Universe

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002nmgm.meet.2087r&link_type=abstract

"THE NINTH MARCEL GROSSMANN MEETING On Recent Developments in Theoretical and Experimental General Relativity, Gravitation and R

Physics

Scientific paper

The peak in the power spectrum at ≈ 130h-1 Mpc at low redshifts provides a standard rod in comoving space. This scale is shown to be present in the observed quasar distribution at z ~ 2. This implies strong constraints on the density parameter, Ω0, and weaker constraints on the cosmological constant, λ0. Independently of λ0 (in the range λ0 ∈ [0, 1]), the constraint is 0.1 < Ω0 < 0.45 (68% confidence limit).
Combination of the power spectrum peak method with very independent results from the supernovae Type Ia method yields Ω0 = (0.30±0.11)+(0.57±0.11)(λ0 - 0.7), 0.55 < λ0 < 0.95, (68% confidence limits) without assuming Ω0 + λ0 = 1. This supports the almost flat, perturbed Friedmann-Lemaître-Robertson-Walker model, independently of any cosmic microwave background observations.

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