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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 | | Affiliation: | IUCAA), Gary A. Mamon (IAP | | Abstract: | In 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 | | Services: | Forum | Review | PDF | Favorites | |
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