Anisotropies in the Cosmic Microwave Background Radiation

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

Since the discovery of temperature anisotropies in the cosmic microwave background (CMB) radiation by COBE in 1992, a large number of ground based and balloon borne experiments have been performed. I will review these observations and show how they can be used to place constraints on cosmological parameters. I will discuss how CMB observations can be combined with observations of Type Ia supernovae to determine the value of the cosmogical constant and spatial curvature. Over the next decade, two satellite experiments, MAP and Planck, are planned to map the anisotropies of the CMB radiation to extremely high precision. These satellites will be provide constraints on fundamental cosmological parameters to unprecedented precision, far beyond those achievable by conventional astronomical techniques. These satellites will revolutionize cosmology.

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