Cosmological Parameters from the Eigenmode Analysis of the Las Campanas Redshift Survey

Abstract

We present the first results of the Karhunen-Loève (KL) eigenmodes applied to real data of the Las Campanas Redshift Survey (LCRS) to simultaneously measure the values of the redshift-distortion parameter, $β= Ω_0^{0.6}/b$, the linearly extrapolated normalization, $σ_8^{\rm L}$, and the CDM shape parameter, $Γ= Ω_0 h$. The results of our numerical likelihood analysis indicate a low value of $β= 0.30 \pm 0.39$, a shape parameter $Γ= 0.16 \pm 0.10$, and a linearly extrapolated normalization $σ_8^{\rm L} = 0.79 \pm 0.08$, which are consistent with a low density universe, $Ω_0 \simlt 0.5$.