The observability of topological defects with ground-based interferometers |
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Authors: | Klaus Maisinger,M. P. Hobson,A. N. Lasenby,& Neil Turok |
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Affiliation: | Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE,;Department of Applied Mathematics and Theoretical Physics, Silver Street, Cambridge CB3 9EW |
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Abstract: | Topological defect theories lead to non-Gaussian features on maps of fluctuations of the cosmic microwave background radiation (CMBR), which enable us to distinguish them from maps predicted by standard inflationary models. We have recently presented a maximum entropy method (MEM) which simultaneously deconvolves interferometer maps of CMBR fluctuations, and separates out foreground contaminants. By applying this method to simulated observations using a realistic ground-based interferometer, we demonstrate that it is possible to recover the prominent hotspots in the CMBR maps which delineate individual defects, even in the presence of a significant Galactic foreground. |
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Keywords: | methods: data analysis techniques: image processing cosmic microwave background |
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