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Large Scale Structure Among z ∼ 2 Quasars as a Cosmological Standard Ruler

Published online by Cambridge University Press:  26 May 2016

B.F. Roukema  and
G.A. Mamon
B.F. Roukema
Affiliation:
Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune, 411 007, India
G.A. Mamon
Affiliation:
Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune, 411 007, India

Abstract

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The peak in the power spectrum at ≈ 130h−1 Mpc at low redshifts provides a standard ruler 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.

Type
Part 1: Radio Source Surveys and Cosmology
Information
Symposium - International Astronomical Union , Volume 199: The Universe at Low Radio Frequencies , 2002 , pp. 54 - 55
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

Broadhurst, T. 1999, oral presentation at the ‘Clustering at High Redshift’ IGRAP meeting, Marseille, 29 June - 2 July 1999 Google Scholar
Broadhurst, T. J., Ellis, R. S., Koo, D. C., Szalay, A. S. 1990, Nature, 343, 726 CrossRefGoogle Scholar
Broadhurst, T., Jaffe, A. H. 2000, submitted (astro-ph/9904348) Google Scholar
de Lapparent, V., Geller, M. J., Huchra, J. P. 1986, ApJ, 302, L1 CrossRefGoogle Scholar
Deng, Z., Xiaoyang, X., Fang, L.-Zh. 1994, ApJ, 431, 506 Google Scholar
Einasto, M., Einasto, J., Tago, E., Dalton, G. B., Andernach, H. 1994, MNRAS, 269, 301 CrossRefGoogle Scholar
Iovino, A., Clowes, R., Shaver, P. 1996, A&AS, 119, 265 Google Scholar
Perlmutter, S. et al. 1999, ApJ, 517, 565 (astro-ph/9812133) Google Scholar
Roukema, B. F., Mamon, G. A. 2000, A&A, submitted (astro-ph/9911413) Google Scholar