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28 March 2024
 
  » arxiv » astro-ph/0010511

 Article overview


Lifting cosmic degeneracy within a single quasar survey
Boudewijn F. Roukema ; Gary A. Mamon ;
Date 25 Oct 2000
Journal Astronomy & Astrophysics 366 (2001) 1
Subject astro-ph
AffiliationIUCAA), Gary A. Mamon (IAP
AbstractIn the almost Friedmann-Lema^itre model of the Universe, the density parameter, Omega_matter, and the cosmological constant, Omega_Lambda, measure curvature. Several linearly degenerate relations between these two parameters have recently been measured. Here, large scale structure correlations at ~100-150 h^-1 Mpc are found in the comoving three-dimensional separations of redshift z approx 2 quasars. These function as a comoving standard rod of length L_LSS approx 130+-10 h^-1 Mpc. A local maximum in the correlation function at approx L_LSS/2 also appears to be significant. By combining separate radial and tangential standard ruler analyses, the lifting of the Omega_matter - Omega_Lambda linear degeneracy within a single data set is demonstrated for the first time.
Source arXiv, astro-ph/0010511
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