Aether Drift and the isotropy of the universe: A measurement of anisotropes in the primordial black-body radiation

Mathematics – Logic

Scientific paper

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Anisotropy, Black Body Radiation, Dicke Radiometers, Isotropy, Universe, Calibrating, Experiment Design, Solar Orbits, Southern Hemisphere, Spherical Harmonics, U-2 Aircraft

Scientific paper

Large-angular-scale anisotropies in the 3 K primordial black-body radiation were detected and mapped with a sensitivity of 2 x to the minus 4 power K and an angular resolution of about 10 deg. The motion of the Earth with respect to the distant matter of the Universe ("Aether Drift") was measured and the homogeneity and isotropy of the Universe (the "Cosmological Principle") was probed. The experiment uses two Dicke radiometers, one at 33 GHz to detect the cosmic anisotropy, and one at 54 GHz to detect anisotropies in the residual oxygen above the detectors. The system was installed in the NASA-Ames Earth survey aircraft (U-2), and operated successfully in a series of flights in both the Northern and Southern Hemispheres. Data taking and analysis to measure the anisotropy were successful.

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