CMB Anisotropies and the Determination of Cosmological Parameters

2000/02/11 by G. Efstathiou, Efstathiou, G.
Physics and Astronomy · #Astrophysics (astro-ph) #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0002249

11 pages, 6 Postscript figures, uses csckapb.sty

arxiv created 2000/02/11 · openalex publication_date 2000/02/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

I review the basic theory of the cosmic microwave background anisotropies in adiabatic cold dark matter cosmologies. The latest observational results on the CMB power spectrum are consistent with the simplest inflationary models and indicate that the Universe is close to spatially flat with a nearly scale invariant fluctuation spectrum. We are also beginning to see interesting constraints on the density of CDM, with a best fit value of omega_c = Omega_c h² of about 0.1. The CMB constraints, when combined with observations of distant Type Ia supernovae, are converging on a Lambda-dominated Universe with Omega_m approx 0.3 and Omega_Lambda approx 0.7.

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