2000/01/05 by O. Lahav, Ofer Lahav, Lahav, Ofer
Computer Science · Physics and Astronomy · #Astrophysics (astro-ph) #Computational Physics and Python Applications #Cosmology and Gravitation Theories #FOS: Physical sciences #Radio Astronomy Observations and Technology #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0001061
Review talk, to appear in the proceedings of the NATO ASI `Structure Formation in the Universe', Isaac Newton Institute, Cambridge, July 1999, ed. R. Crritenden & N, Turok. Kluwer; 12 pages Latex, with 3 embedded figures. Uses crckapb.sty
arxiv created 2000/01/05 · openalex publication_date 2000/01/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We review observational tests for the homogeneity of the Universe on large scales. Redshift and peculiar velocity surveys, radio sources, the X-Ray Background, the Lyman-α forest and the Cosmic Microwave Background are used to set constraints on inhomogeneous models and in particular on fractal-like models. Assuming the Cosmological Principle and the FRW metric, we estimate cosmological parameters by joint analysis of peculiar velocities, the CMB, cluster abundance, IRAS and Supernovae. Under certain assumptions the best fit density parameter is Omegam = 1 - lambda ≈ 0.4 . We present a new method for joint estimation by combining different data sets in a Bayesian way, and utilising `Hyper-Parameters'.