DETECTION OF DEGREE-SCALE ANISOTROPY: A SUMMARY OF ACME ANISOTROPY RESULTS
From 1988 to 1994, the Advanced Cosmic Microwave Explorer (ACME) ew six times on balloons and observed three times from the South Pole. Observing degree-scale anisotropy in the Cosmic Background Radiation over an angular scale from 20 to 120 arc minutes and overawavelength range from 1 to 12 mm, the...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.393.5195 http://www.slac.stanford.edu/pubs/slacreports/reports04/ssi94-018.pdf |
| Summary: | From 1988 to 1994, the Advanced Cosmic Microwave Explorer (ACME) ew six times on balloons and observed three times from the South Pole. Observing degree-scale anisotropy in the Cosmic Background Radiation over an angular scale from 20 to 120 arc minutes and overawavelength range from 1 to 12 mm, the ACME experiments have made signi cant contributions to our understanding of the CBR including the rst detection of degree-scale anisotropy at a level of 10{40 ppm, the rst measurement of the CBR power spectrum at degree scales and the rst evidence for a rise in the power spectrum at sub degree scales. These results have subsequently been largely corroborated by other experiments. Such measurements allow us to begin to critically test cosmological models in a quantitative fashion and have set the stage for the possibility of measuring a number of critical cosmological parameters in the next generation of experiments. Because of the extreme sensitivities needed (1{10 ppm) and the di culties of foreground sources, the next generation of measurements will require not only |
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